Calcita

Características generales

Fórmula: CaCO₃
Sistema de cristalización: Trigonal
Lustre: Vítreo
Color: Incoloro puro; ofrece varias tonalidades de gris, amarillo, marrón, rojo, verde, azul y negro cuando hay impurezas presentes
Dureza: 3
Rareza: muy común
Grupo de minerales: Grupo de la Calcita
Serie: Calcita - Rodocrosita.

Clasificación

Estado IMA: Válido. Descrito con antelación a 1959 (pre-IMA), se considera un mineral clásico o histórico (grandfathered)

Nickel-Strunz : 05.AB.05

5: Carbonatos (nitratos)
05.A: Carbonatos sin aniones adicionales, sin H2O
05.AB: Carbonatos con tierras alcalinas (y otros M²⁺)

Dana 8th ed. : 14.1.1.1

Descripción

La calcita, cuyo nombre deriva del latín calx, es un mineral muy común. Es, en efecto, el componente principal, y a veces el único, de rocas como las calizas, los mármoles y los alabastros, de concreciones como las estalactitas y las estalagmitas, de oolitos, pisolitos y una particular masa llamada leche de monte. Las rocas de las es el principal componente cubren cerca del 40% de la superficie terrestre.

Es un mineral muy abundante y que se suele confundir con otros minerales comunes como la dolomita, el cuarzo, la halita o el yeso, especialmente cuando se presenta masivo o en agregados microcristalinos formando rocas monominerálicas o rellenando fracturas. La mejor forma para identificar a la calcita es por sus cristalización y por el test del ácido, pues este mineral siempre produce efervescencia con, por ejemplo el HCl, ya que en esa reacción se libera CO₂, que origina las burbujas.

Fotografías

En la galería de fotografías dispones de 22 fotografías de Calcita

Calcita (2 de 3)

Calcita (1 de 3)

Calcita de Mina Moscona (1 de 3)

Calcita (1 de 3)

Calcita (3 de 3)

Calcita de Mina Moscona (2 de 3)

Polimorfos

Imagen	Mineral	Fórmula	Sistema	Dureza	Color	Raya	Brillo
	Vaterita	CaCO₃	Hexagonal	3	Incoloro	Blanco
	Aragonito	CaCO₃	Ortorrómbico	3,5-4	Blanco es el más frecuente. También violáceo, marrón, negro, azul o verde	Blanco	Vítreo

Formación y ambiente

La calcita es un típico mineral de génesis sedimentaria que se forma bien de forma química mediante evaporación de soluciones muy ricas en bicarbonato cálcico (caliza química), o bien por la actividad de los organismos marinos que forman sus conchas de carbonato cálcico y al morir sedimentan éstas dando lugar a las llamadas calizas organogénicas. También puede tener un origen metamórfico (mármoles, esquistos calcáreos); en algunas raras ocasiones forma rocas ígneas (carbonatitas).

Accesorio, hidrotermal, ígneo, magmático, metamórfico, pegmatítico, postmagmático, postvolcánico, sedimentario.

Propiedades fisicas

Hábito: La calcita se presenta de formas muy variadas, pero las más frecuentes son los cristales romboédricos, escalenoédricos y prismáticos, con posibles combinaciones de estas formas. La calcita puede ser incolora o transparente si es pura (espato de Islandia) o coloreada en los más diversos colores, en relación con la presencia de pigmentos o impurezas. Los escalenoedros muy agudos se conocen como dientes de perro y los muy obtusos, coronando las bases de los prismas trigonales, como cabezas de clavo. Por compresión da lugar a maclas polisintéticas laminares.

Con frecuencia se presenta en forma de masas microcristalinas compactas dando lugar a las calizas, que por metamorfismo originan rocas con una típica estructura sacaroidea, los mármoles. En masas fibrosas la calcita consituye las alabastritas o alabastros; depósitada a partir de aguas ricas en carbonato cálcico, este mineral origina las estalactitas y estalagmitas, los oolitos, los pisolitos y la calcita pulverulenta microcristalina, todos ellos depósitos característicos de cuevas calcáreas; también consitituye los típicos travertinos.

Lustre: Vítreo

Transparencia: Transparente, Opaco

Color: Incoloro puro; ofrece varias tonalidades de gris, amarillo, marrón, rojo, verde, azul y negro cuando hay impurezas presentes

Color en sección fina: Incolora

Raya: Blanco

Dureza (Mohs): 3

Tenacidad: Frágil

Exfoliación::

Primera exfoliación: Perfecta en [1011]
Segunda exfoliación: Perfecta en [1011]
Tercera exfoliación: Perfecta en [1011]

Fractura: Concoidal

Densidad: 2,6-2,7 g/cm³ (medida) | 2,71 g/cm³ (calculada)

Cristalografía

Sistema cristalino:

Trigonal

Clase (H-M): 3m (3*2/m) - Hexagonal escalenohedral

Grupo espacial: R3*c

Parámetros de la celda: a=4,989Å b=4,934Å c=17,062Å

Estructura del cristal: α=90º β=90º γ=120º

Volumen de unidad de celda: V 367,78Å

Z: 6

Macla: Cuatro tipos diferentes de macla de contacto

Difracción de Rayos X:

Difracción de Rayos X
D(hkl)	Intensidad
3,035	100
2,095	18
2,285	18

Propiedades ópticas

Tipo: Uniaxial (-)

Valores RI: n_α= 1,486; n_γ= 1,64 - 1,66

Máxima birrefringencia: δ = 0,174

Dispersión: Débil, r<v

Pleocroismo: Pleiocroico
X: Incoloro
Y: Incoloro
Z: Incoloro

Propiedades químicas

Fórmula: CaCO₃

Elementos químicos: Ca, C, O

Composición química: C: 12,00%, Ca: 40,04%, O: 47,96%, CO3: 59,94%,

Tests químicos

Fusibilidad: 7; Mineral tipo: Cuarzo; Punto de fusión: 1710ºC; Infusible con soplete
Reacción a los ácidos: Se disuelve con efervescencia en ácido clorhídrico.
Color de la llama: Rojo
Ensayos en tubo abierto: Decrepita.
Ensayos en tubo cerrado: Decrepita.
Formación de sublimados: Decrepita. Se vuelve brillantemente incandescente
Otros: Puede ser diferenciada del Aragonito por el test de Meigen (ver ficha del aragonito). Se puede diferenciar de la Dolomita por el test de Lemberg, que consiste en hervir una muestra durante 15 minutos con cloruro de aluminio y astillas; la calcita se tiñe de rosa, la dolomita no.

Otras propiedades

Fluorescente:
Fluorescente (LW): Blanco-amarillo, blanco, rojo, naranja, verde o azul.
Termoluminiscente: Blanco-amarillo, blanco, rojo, naranja, verde o azul.
Triboluminiscente: Blanco-amarillo, blanco, rojo, naranja, verde o azul.
Fluorescencia: Bajo luz ultravioleta reflejando los colores verde, amarillo, azul y rojo
Fosforescencia: Bajo luz ultravioleta reflejando los colores verde, amarillo, azul y rojo
Magnetismo: No magnético

Relaciones con otros minerales

Miembro del grupo de minerales: Grupo de la Calcita

Minerales pertenecientes al Grupo de la Calcita

Mineral	Fórmula	Sistema	Dureza	Color	Raya	Brillo
Calcita	CaCO₃	Trigonal	3	Incoloro puro; ofrece varias tonalidades de gris, amarillo, marrón, rojo, verde, azul y negro cuando hay impurezas presentes	Blanco	Vítreo
Esferocobaltita	CoCO₃	Trigonal	3-4	Rosa a rojo, marrón, gris, oscuro en la superficie alterada	Rosa rojiza	Vítreo a adamantino
Gaspeita	Ni(CO₃)	Trigonal	4-5	Verde claro	Vítreo plomizo
Magnesita	MgCO₃	Trigonal	3,5-4,5	Blanco	Vítreo
Otavita	CdCO₃	Trigonal	3,5-4	Blanco	Adamantino - perla
Rodocrosita	MnCO₃	Trigonal	3,5-4,5	Generalmente rosado, pero también pardo, gris amarillento, rojo, rojo rosado	Blanco	Vítreo
Siderita	FeCO₃	Trigonal	3,5-4	Muy variable desde amarillento a pardo muy oscuro	Blanco	Vítreo
Smithsonita	ZnCO₃	Trigonal	5,5	Muy variado	Blanco	Vítreo

Minerales acompañantes

Mineral	Fórmula	Sistema	Dureza	Color	Raya	Brillo
Apatito		Hexagonal	4,5-5	Variable (incoloro, parduzco, verdoso).	Blanco	Vítreo
Barita	BaSO₄	Ortorrómbico	2,5-3,5	Variable predominando el blanco y el pardo tenue.	Blanco	Vítreo
Berilo	Be₃Al₂(Si₆O₁₈)	Hexagonal	7,5-8	Blanco	Vítreo - resinoso
Biotita	K(Mg, Fe)₃AlSi₃O₁₀(OH, F)₂	Monoclínico	2,5-3	Pardo oscuro, pardo verdoso, pardo-negro	Gris	Vítreo - perlado
Cobre	Cu	Cúbico	2,5-3	Rojo cobre	Rosa	Metálico
Dolomita	CaMg(CO₃)₂	Trigonal	3,5-4	Incoloro, blanco, blanco rojizo, blanco grisáceo o blanco pardusco.	Blanco	Vítreo
Fluorita	CaF₂	Cúbico	4	Incoloro puro, pero dependiendo de sus impurezas puede ser blanca, verde, amarilla, anaranjada, rojiza o violácea.	Blanco	Vítreo
Galena	PbS	Cúbico	2,5-2,8	Gris plomo, algo más claro si contiene plata	Negro grisáceo	Metálico
Oro	Au	Cúbico	2,5-3	Amarillo característico más o menos claro según la plata que contenga (variedad electrum). El oro y la plata forman una serie de soluciones sólidas por lo que la mayoría de oro contiene Ag. El de California contiene Cu	Amarilla	Metálico
Yeso	CaSO₄·2H₂O	Monoclínico	1,5-2	Incoloro puro, y de amarillo a rojo dependiendo de las impurezas.	Blanco	Perlado
Hematites	Fe₂O₃	Trigonal	5,5-6,5	Varía desde parduzco, rojo sangre, rojo brillante y rojo parduzco a gris acero y negro hierro	Pardo rojiza	Metálico
Heulandita	(Na,Ca)_2-3Al₃(Al,Si)₂Si₁₃O₃₆ · 12H₂O	Monoclínico	3,5-4	Amarillo, blanco, blanco rojizo, blanco grisáceo o blanco pardusco	Blanco	Vítreo - perlado
Laumontita	CaAl₂Si₄O₁₂·4H₂O	Monoclínico	3,5-4	Blanco, rosado, amarillento, grisáceo o pardo.	Blanco	Vítreo
Cuarzo	SiO₂	Trigonal	7	Blanco, transparente. Según variación también puede ser rosa, rojizo o negro.	Blanco	Vítreo
Esfalerita	ZnS	Cúbico	3,5-4	Varía entre amarillento y gris	Blanca a amarillo impuro	Resinoso - graso
Estilbita	(Na,Ca)_n(Si₂₇Al₉)O₇₂·28H₂O	Monoclínico	3,5-4	Blanco	Vítreo - perlado
Azufre	S₈	Ortorrómbico	1,5-2,5	Amarillo citrino puro o pardo, casi negro, con impurezas bituminosas.	Blanco	Resinoso

Yacimientos y localidades de interés

Grandes romboedros muy límpidos de calcita se encuentran en las cavidades de los basaltos islandeses (espato de Islandia), así como en Alemania, República Checa y Colorado (Estados Unidos). Cristales rosados o verdosos se han descubierto en Cumberland (Cornualles, Reino Unido). Otras localidades son Joplin (Missouri), donde la calcita aparece asociada a galena y esfalerita, y Freiberg (Alemania). Son también muy conocidos los agregados de calcita procedentes de Fontainebleau (Francia) y de Michigan.

En España son excelentes los cristales en diente de perro que aparecen en los yacimientos de esfalerita y fluorita en Asturias y Cantabria. Excepcionales las grandes masas espáticas, a veces coloreadas, que aparecen junto a la galena en Linares y La Carolina (Jaén). En proximidad de Madrid, en la faja del cretácico calizo se encuentran ejemplares con cristalitos muy brillantes y de buena conformación. Es famoso el Espato de Islandia de la localidad de Dima (Vizcaya) por su pureza.

Localidades

South China Sea - Localidad tipo.
Ballycraigy, Larne, Co. Antrim, Northern Ireland - Localidad tipo.
Molina and Valencia, Migranilla (near), Aragon, Spain - Localidad tipo.
Lapis-lazuli mine, Sar-e-Sang, Badakshan Province, Afghanistan
Alma, Algeria
Babel Oued, Algeria
Bougie, Algeria
Biggenden, Queensland, Australia
Burra Burra mine, Burra, South Australia, Australia
Colebrook Hill, Rosebery, Tasmania, Australia
Cygnet, Tasmania, Australia
Hartz Ranges, Northern Territory, Australia
Kara mine, Hampshire, Tasmania, Australia
Middlesex Plains, Tasmania, Australia
Mt Cleveland Mine, Luina, Tasmania, Australia
Mt Elliott mine, Cloncurry, Mt Isa/Cloncurry region, Queensland, Australia
Mt Lyell, Tasmania and Tingha, New South Wales, Australia
Proprietary mine, Broken Hill, New South Wales, Australia
Prospect Hill, New South Wales, Australia
Annaberg, Lower Austria, Austria
Bergenzerwald, Vorarlberg, Austria
Bleiberg district, Kärnten, Austria
Neufinkenstein-Grabanz, Mallestiger Mittagskogel, Finkenstein, Villach, Kärnten, Austria
Obergreuth, Mallestiger Mittagskogel, Finkenstein, Villach, Kärnten, Austria
Rotgülden, Salzburg, Austria
Schellgaden, Salzburg, Austria
Schwaz-Brixlegg, Tyrol, Austria
Walchen slags, Öblarn, Liezen, Steiermark, Austria
Weitendorf, Steiermark, Austria
Dashkesan mine, Caucasus mts, Azerbaijan
Arquennes, Hainaut, Walloon Brabant, Belgium
Bioul, Namur, Walloon Brabant, Belgium
Canal Willebroeck, Charleroi, Blaton, Hainaut, Belgium
Chokier, Liege, Walloon Brabant, Belgium
Comblain, Belgium
Denee, Namur, Walloon Brabant, Belgium
Engis, Liege, Walloon, Belgium
Gralex Quarry, Mont-sur-Marchienne, Hainaut, Belgium
Landelies, Hainaut, Walloon Brabant, Belgium
Quenast, Brabant, Walloon Brabant, Belgium
Rhisnes, Namur, Walloon Brabant, Belgium
Seilles, Namur, Walloon Brabant, Belgium
Villiers en Fagne, Namur, Walloon Brabant, Belgium
Aliada Mine, Colquechata Mt., Chayanta, Potosí Dept, Bolivia
Cerro Rico Mt., Potosí, City, Potosí Dept, Bolivia
El Dragón mine, Quijarro, Potosí Dept, Bolivia
Potosí Dept, Bolivia
Quime, Inquisivi, La Paz, Bolivia
Irai, Rio Grande do Sul, Brazil
Morro Velho Gold mine, Nova Lima, Minas Gerais, Brazil
Sao Gabriel, Rio Grande do Sul, Brazil
Deveti Septemvri Mine, Madan, Rhodope Mtns., Plovdiv, Bulgaria
Droujba, Laki, Rhodope Mtns., Plovdiv, Bulgaria
Madan, Rhodope Mtns., Plovdiv, Bulgaria
Ackerman mine, Deloro, Hastings Co., Ontario, Canada
Bancroft, Hastings Co., Ontario, Canada
Beaverdell, British Columbia, Canada
Bessemer Mine, Mayo Township, Bancroft, Hastings Co., Ontario, Canada
Bicroft mine, Bancroft, Hastings Co., Ontario, Canada
Burgess Mine, Carlow Township, Bancroft, Hastings Co., Ontario, Canada
Cameron Quarry, Carleton Place, Ontario, Canada
Cardiff Uranium mine, Wilberforce, Ontario, Canada
Davis Hill, Dungannon Township, Bancroft, Hastings Co., Ontario, Canada
Davis Quarry, Dungannon Township, Bancroft, Hastings Co., Ontario, Canada
Demix-Varennes quarry, Saint-Amable sill, Varennes, Verchéres Co., Québec, Canada
Desmont Mine, Wilberforce, Monmouth Township, Haliburton Co., Ontario, Canada
Dundas Quarry, Wentworth Co., Ontario, Canada
East Kemptville Tin Mine, East Kemptville, Yarmouth Co., Nova Scotia, Canada
Egan Chute, Dungannon Township, Bancroft, Hastings Co., Ontario, Canada
Engineer mine, Tagish Lake, near Atlin, British Columbia, Canada
Evans-Lou pegmatite, near St-Pierre-de-Wakefield, Portland Twp., Papineau Co., Québec, Canada
Faraday mine, Faraday Township, Bancroft, Hastings Co., Ontario, Canada
Francon quarry, St-Michel distr., Montreal Island, Québec, Canada
Glen Lake Mine, Cobalt, Timiskaming district, Ontario, Canada
Henderson No.2 mine, Chibougamau, Abitibi Co., Québec, Canada
Highland Bell mine, Beaverdell, British Columbia, Canada
Highway 105, Old Chelsea, Hill Township, Gatineau Co., Québec, Canada
Highway 28 Roadcut Near Belton Road, Mayo Township, Bancroft, Hastings Co., Ontario, Canada
Hwy 28 road fill, Mayo Township, Bancroft, Hastings Co., Ontario, Canada
Jeffrey pit, Asbestos, Shipton Twp., Richmond Co., Québec, Canada
Lac Nicolet mine, Ham Sud, Wolfe Co., Québec, Canada
Lake Clear - Kuehl Lake area, Renfrew Co., Ontario, Canada
Lake George antimony mine, York Co., New Brunswick, Canada
Lincoln Quarry, Beamsville, Ontario, Canada
MacDonald mine, Monteagle Township, Bancroft, Hastings Co., Ontario, Canada
Meany Mine, Lake Clear, Renfrew Co., Ontario, Canada
Mt St.-Hilaire, Rouville Co., Québec, Canada
Nanisivik Mine, Baffin Island, Nunavut, Northwest Territories, Canada
Orford Nickel mine, Québec, Canada
Parker mine, Notre Dame du Laus, Québec, Canada
Port Radium, Northwest Territories, Canada
Poudrette quarry, Mt St.-Hilaire, Rouville Co., Québec, Canada
Rogers Fluorspar mine, Huntingdon Township, Madoc, Hastings Co., Ontario, Canada
Saranac Mine, Tory Hill, Monmouth Township, Hastings Co., Ontario, Canada
Sherbrooke, Québec, Canada
Silvana mine, Sandon, British Columbia, Canada
Silver Crater mine, Faraday Township, Bancroft, Hastings Co., Ontario, Canada
Silver Islet mine, Lake Superior, Ontario, Canada
Smart Mine, Lake Clear, Renfrew Co., Ontario, Canada
Southern Baffin Island, Nunavut, Northwest Territories, Canada
Taylor pit, Madoc, Huntingdon, Hastings Co., Ontario, Canada
Turner's Island Mine, Lake Clear, Renfrew Co., Ontario, Canada
Van Silver mine, Brandywine Creek, British Columbia, Canada
Wilberforce, Haliburton Co., Ontario, Canada
Woodcox Mine, Bancroft, Monteagle Township, Hastings Co., Ontario, Canada
Yates Uranium mine, Otter Lake, Pontiac Co., Ontario, Canada
Yellow Lake, near Olalla, British Columbia, Canada
York River Skarn, Dungannon Township, Bancroft, Hastings Co., Ontario, Canada
Chenzou mine, Hunan province, China
Henyan, Hunan Province, China
Kaiyang, Guizhou Province, China
Alexander Gallery, Vrancice, Príbram, Stredocesky, Czech Republic
Bezdecin, Zelezny Brod, Severocesky, Czech Republic
Bohutin, Príbram, Stredocesky, Czech Republic
Borovec, Zdar nad Sazavou, Maehren, Czech Republic
Dobrna, Decin, Krusne Hory, Vychodocesky, Czech Republic
Doubravice, Jicin, Vychodocesky, Czech Republic
Horni Bory, Zdar nad Sazavou, Maehren, Czech Republic
Horni Hostice, Maehren, Czech Republic
Hütte, Príbram, Stredocesky, Czech Republic
Kank, Kutna Hora, Stredocesky kraj, Bohemia, Czech Republic
Kasejovice, Západocesky, Czech Republic
Krasna Hora nad Vltavou, Príbram, Stredocesky, Czech Republic
Krupka, Krusne Hory, Vychodocesky, Czech Republic
Libodrice, Kutna Hora, Stredocesky, Czech Republic
Lill mine, Brezove hory (Birkenberg), Príbram, Stredocesky, Czech Republic
Litce nad Orlici, Vychodocesky, Czech Republic
Medenec (Kupferberg), Chomutov, Krusne Hory, Vychodocesky, Czech Republic
Moldava, Teplice, Krusne Hory, Vychodocesky, Czech Republic
Policany, Kutna Hora, Czech Republic
Predborice, Stredocesky kraj, Bohemia, Czech Republic
Soutesky, Decin, Krusne Hory, Vychodocesky, Czech Republic
Studenec, Jilemnice, Vychodocesky, Czech Republic
Trebsko Deposit, Príbram, Stredocesky, Czech Republic
Vlastejovice, Kutna Hora, Stredocesky, Czech Republic
Vsechlapy, Teplice, Krusne Hory, Vychodocesky, Czech Republic
Fuglo, Faroe Islands, Denmark
Vaago, Faroe Islands, Denmark
Westmanhaven, Faroe Islands, Denmark
Ball Eye quarry, Bosnal, Derbyshire, England
Barden Hill Quarry, Coalville, Leicestershire, England
Baron Cross Quarry, Stainton, Cumbria, England
Barrow Mine, Braithwaite, Cumbria, England
Batts Coombe Quarry, Cheddar, Somerset, England
Beckermet Mine, Egremont, Cumbria, England
Bigrigg mine, Egremont, Cumbria, England
Birchington, Kent, England
Blagill mine, Alston moor, Cumbria, England
Boltsburn mine, Rookhope, Weardale, Co. Durham, England
Bonsall Moor Quarry, Winster, Derbyshire, England
Bonser Mine, Coniston copper mines, Cumbria, England
Botallack mine, Botallack, St. Just, Cornwall, England
Boyers quarry, Isle of Portland, Dorset, England
Bramham, Yorkshire, England
Brownley Hill Pb-Zn mine, Nenthead, Cumbria, England
Cambokeels mine, near Eastgate, Weardale, Co. Durham, England
Cammock Eals mine, Stanhope, Weardale, Co. Durham, England
Cannington Park Quarry, Bridgewater, Somerset, England
Carrock mine, Caldbeck Fells, Cumbria, England
Charmouth beach, Dorset, England
Cleator Moor Iron Mines, Cleator Moor area, Cumbria, England
Coldstones Quarry, Greenhow, Yorkshire, England
Colemans Quarry, Holwell, Nr. Frome, Somerset, England
Coniston Copper Mines, Coniston, Cumbria, England
Crich Quarry, Crich, Derbyshire, England
Croft pit, Bigrigg, Egremont, Cumbria, England
Croft quarry, Leicestershire, England
Cuckmere Haven, East Sussex, England
Dale Head Mine, Newlands Valley, Cumbria, England
Dean quarry, St. Keverne, Cornwall, England
Deer Hills Baryte mine, Caldbeck Fells, Cumbria, England
Delabole Slate quarry, Tintagel, Cornwall, England
Dirtlow Rake, Castleton, Derbyshire, England
Distington Quarries, Distington, Cumbria, England
Dodington mine, Bridgewater, Somerset, England
Dovedale Farm., Hardwick Hall, Nottinghamshire, England
Drakewalls mine, Calstock, Cornwall, England
Driggith Mine, Caldbeck Fells, Cumbria, England
Dry Gill mine, Caldbeck Fells, Cumbria, England
Dulcoate quarry, Somerset, England
Dulcote Quarry, Wells, Somerset, England
Dutchman Level Dump, Ecton Hill, Wetton, Staffordshire, England
Eagle Crag Mine, Patterdale, Cumbria, England
Ecton Hill,Clayton Adi, Ecton Hill, Staffordshire, England
Egremont, Cumbria, England
Ejam, Derbyshire, England
Engine Vein, Alderley Edge, Shropshire, England
Eskett Quarry, Rowrah, Cumbria, England
Florence mine, Egremont, Cumbria, England
Flusco Quarry, Newbiggin, Cumbria, England
Force Crag Mine, Keswick, Cumbria, England
Frazer's Hush mine, Rookhope, Weardale, Co. Durham, England
Garrigill, Cumbria, England
Geevor mine, Trewellard, St. Just, Cornwall, England
Gillfoot Park & Helder Mines, Egremont, Cumbria, England
Graphite Mine, Seathwaite, Cumbria, England
Great Sled Dale, Swaledale, Yorkshire, England
Greenside mine, Patterdale, Cumbria, England
Greystones quarry, Lezant, Cornwall, England
Groverake mine, Rookhope, Weardale, Co. Durham, England
Haille Moor Mine, Beckermet, Cumbria, England
Hampstead Farm quarry, Chipping Sodbury, Gloucestershire, England
Hay Gill Copper mine, Caldbeck Fells, Cumbria, England
Heights mine, Eastgate, Weardale, Co. Durham, England
Heights Quarry, Westgate, Weardale, Co. Durham, England
Herodsfoot mine, Lanreath, Cornwall, England
Herrods Hill, Huthwaite, Nottinghamshire, England
Higher Pitts mine, Priddy, Mendip Hills, Somerset, England
Hilston Beaches, Holderness, Humberside, England
Hodbarrow mine, Cumbria, England
Hope's Nose, Tor Bay, Torquay, Devon, England
Isolation Mine, Snelstone Nr Ashbourne, Derbyshire, England
Judkins quarry, Nuneaton, Warwickshire, England, England
Ladywell mine, Shelve, Shropshire, England
Leighton Buzard, Bedfordshire, England
Levant mine, Pendeen, St. Just, Cornwall, England
Lulworth Cove, Dorset, England
Lyme Regis, Dorset, England
Magpie Sough, Sheldon, Derbyshire, England
Matlock, Derbyshire, England
Meden Bank, Stanton Hill, Nottinghamshire, England
Meldon BR Quarry, Okehampton, Devon, England
Merehead quarry, near Cranmore, Mendips, Somerset, England
Millclose mine, Wensley, Derbyshire, England
Millrigg Mine, Staveley, Cumbria, England
Milltown Quarry, Ashover, Derbyshire, England
Mosedale Quarry, Mosedale, Carrock Fell, Cumbria, England
Mossbay Mine, Bigrigg, Cumbria, England
Mountfield Mine, Mountfield, Sussex, England
Nentsberry Haggs mine, Nenthead, Cumbria, England
New Aplite Quarry, Meldon, Okehampton, Devon, England
New Cliffe Hill quarry, Markfield, Leicestershire, England
Newlandside Quarry, Stanhope, Co. Durham, England
Old Millclose Mine, Matlock, Derbyshire, England
Old Potts Gill mine, Caldbeck Fells, Cumbria, England
Pallaflat Mine, Bigrigg, Cumbria, England
Parkhouse Quarry, Johnby, Cumbria, England
Penberthy Croft mine, St. Hilary, Cornwall, England
Pike Lane Opencut, Winster Moor, Derbyshire, England
Port Quin, St. Endellion, Cornwall, England
Porthoustock quarry, St. Keverne, Cornwall, England
Red Gill mine, Caldbeck Fells, Cumbria, England
Rorrington Mine, Chirbury, Shropshire, England
Rotherhope Fell Mine, Alston, Cumbria, England
Roughton Gill Mine, Caldbeck Fells, Cumbria, England
Sacheveral Farm, Winster, Derbyshire, England
Shap Beck Qry, Shap, Cumbria, England
Shap Blue Quarry, Shap, Cumbria, England
Shap Pink Quarry, Shap, Cumbria, England
Sidestrand (beach), Cromer, Norfolk, England
Silver Gill, Caldbeck Fells, Cumbria, England
Slayley Quarry, Bonsal, Derbyshire, England
Smallcleugh mine, Nenthead, Cumbria, England
Snailbeach mine, Snailbeach, Shropshire, England
Springhill quarry, Peldar Tor, Whitwick, Leicestershire, England
Squilver Quarry, Dysgwylfa Hill, Shropshire, England
Stank Mine, Barrow, Cumbria, England
Threlkeld Quarry, Threlkeld, Cumbria, England
Thurstaston Beach, Wirral, Merseyside, England
Tynebottom mine, Garrigill, Cumbria, England
Vale Road Quarry, Mansfield Woodhouse, Nottinghamshire, England
Wapping mine, Matlock Bath, Derbyshire, England
Warden Point, Isle of Sheppey, Kent, England
Waterbank mine, Ecton, Staffordshire, England
Weardale, Co. Durham, England
West Pastures Mine, Stanhope, Weardale, Co. Durham, England
Wetgrooves Mine, Aysgarth, Yorkshire, England
Whale Chine, Atherfield, Isle of Wight, England
Whatley Quarry, Wells, Somerset, England
Wheal Cock, Botallack, St. Just., Cornwall, England
Wheal Edward, St. Just, Cornwall, England
Wheal Friendship, Mary Tavy, Devon, England
Wheal Mary Ann, Menheniot, Cornwall, England
Wheal Owles, St. Just, Cornwall, England
Wheal Wrey, Liskeard, Cornwall, England
Windscales, Egremont, Cumbria, England
Wirksworth, Rent Tor, Derbyshire, England
Woodleaze Quarry, Tytherington Quarries, Gloucestershire, England
Wyche Quarries, Worcestershire, England
Wyndham Pit, Nr. Egremont, Cumbria, England
Pargas, Turku-Pori, Finland
Bellecroix, Fontainebleau, Seine-et-Marne, France
Cap Garonne, Le Pradet, Var, France
Chessy-les-Mines, Rhône, Rhône-Alpes, France
Duranus, Alpes-Maritimes, France
Falgayrolles, Aveyron, Midi-Pyrénées, France
Jas Roux, Valgaudemar, Haute-Alpes, France
La Pacaudière, Le Crozet, Loire, Rhône-Alpes, France
Les Farges mine, Corrèze, Limousin, France
Mas d'Alary, Hérault, Languedoc-Roussillon, France
Monsols, Rhône, Rhône-Alpes, France
Mt Roussi, near Servoz, Haute-Savoie, France
Roua mine, Guillaumes, Alpes-Maritimes, France
Tistoulet mine, Padern, Aude, Languedoc-Roussillon, France
Trimouns Talc mine, Ariège, Midi-Pyrénées, France
Andreasberg, Harz Mtns., Niedersachsen, Germany
Anton mine, Heubachtal, Wittichen, Baden-Wuerttemberg, Germany
Arensberg quarry, Zilsdorf, Rheinland-Pfalz, Germany
Artenberg quarry, Kinzigtal, Baden-Wuerttemberg, Germany
Atterode mine, Bad Salzungen, Thüringen, Germany
Bärensteinbruch quarry, Radautal, Bad Harzburg, Harz Mts, Sachsen, Germany
Biseschacht am Iberg, Bad Grund, Harz Mts, Sachsen, Germany
Clara mine, Oberwolfach, Baden-Wuerttemberg, Germany
Claus-Friedrich mine, St. Andreasberg, Harz Mts, Sachsen, Germany
Daniel mine, Schneeberg, Sachsen, Germany
Ettringer Bellerberg, Ettringen, Mayen, Eifel, Rheinland-Pfalz, Germany
Ferdinand mine, Alpirsbach, Baden-Wuerttemberg, Germany
Floßberg mine, Bad Lauterberg, Harz Mts, Sachsen, Germany
Fohberg, Kaiserstuhl, Baden-Wuerttemberg, Germany
Friedenstein mine, Ruhla, Bad Salzungen, Thüringen, Germany
Fünf Bücher Mosis mine, St. Andreasberg, Harz Mts, Sachsen, Germany
Glückauf mine, Bad Grund, Harz Mts, Sachsen, Germany
Glücksrad mine, Clausthal-Zellerfeld, Harz Mts, Sachsen, Germany
Gottlob mine, Friedrichroda, Bad Salzungen, Thüringen, Germany
Hechtsberg quarry, Kinzigtal, Baden-Wuerttemberg, Germany
Heimberg quarry, Möncheholz, Langelsheim, Harz Mts, Sachsen, Germany
Herzog Friedrich mine, Reinerzau, Alpirsbach, Baden-Wuerttemberg, Germany
Herzog-Julius-Hütte, Goslar, Harz Mts, Sachsen, Germany
Hilfe Gottes mine, Wiemannsbucht, Bad Grund, Harz Mts, Sachsen, Germany
Himmelfürst mine, Freiberg, Sachsen, Germany
Hühn mine, Trusetal, Bad Salzungen, Thüringen, Germany
Humberg, Kaiserstuhl, Baden-Wuerttemberg, Germany
Huneberg quarry, Bad Harzburg, Harz Mts, Sachsen, Germany
Johann mine, Wittichen, Baden-Wuerttemberg, Germany
Johannis Segen mine, Kinzigtal, Baden-Wuerttemberg, Germany
Kafersteige mine, Pforzheim, Baden-Wuerttemberg, Germany
Karem quarry, Birresborn, Eifel, Germany
Kirchberg, Kaiserstuhl, Baden-Wuerttemberg, Germany
Kochenfeld mine, Trusetal, Bad Salzungen, Thüringen, Germany
Lautenthaler Hütte, Langelsheim, Harz Mts, Sachsen, Germany
Limburg, Kaiserstuhl, Baden-Wuerttemberg, Germany
Ludwig mine, Aldersbachtal, Hausach, Baden-Wuerttemberg, Germany
Michelsberg mine, Gutachtal, Kinzigtal, Baden-Wuerttemberg, Germany
Mommel mine, Kohlberg, Trusetal, Bad Salzungen, Thüringen, Germany
Nesselgrund quarry, Schnellbach, Bad Salzungen, Thüringen, Germany
Ochsenhütte, Granestausee, Goslar, Harz Mts, Sachsen, Germany
Orberg-Badberg, Kaiserstuhl, Baden-Wuerttemberg, Germany
Pflasterkaute quarry, Eisenach, Thüringen, Germany
Rammelsberg mine, Goslar, Harz Mts, Sachsen, Germany
Rötenbach quarry, Alpirsbach, Baden-Wuerttemberg, Germany
Sangerhausen, Sachsen, Germany
Sangershausen, Thuringia, Sachsen, Germany
Schweina-Glücksbrunn, Bad Liebenstein, Eisenach, Thüringen, Germany
Spitzenberg mines, Bad Harzburg, Harz Mts, Sachsen, Germany
St. Andreasberg, Hartz Mts, Niedersachsen, Germany
Stahlberg mine, Kohlberg, Trusetal, Bad Salzungen, Thüringen, Germany
Steinbissäge, Gremmelsbach, Kinzigtal, Baden-Wuerttemberg, Germany
Urberg, St. Blasien, Baden-Wuerttemberg, Germany
Wenzel mine, Oberwolfach, Baden-Wuerttemberg, Germany
Winterberg quarry, Bad Grund, Harz Mts, Sachsen, Germany
Wolkenhügel mine, Bad Lauterberg, Harz Mts, Sachsen, Germany
Hilarion adit, Agios Konstandinos, Laurion, Attica, Greece
Kamaréza Central mine, Laurion, Attica, Greece
Milos, Kikladhes, Southern Aegean, Greece
Fiskenaesset, Greenland
Fiskenaesset, Nuuk, Greenland
Ilimaussaq, West Greenland
Winterswijk, Gelderland, Holland
Rudabanya, Borsod-Abaúj-Zemplén County, Hungary
Breidhdalur-Berufsjördhur area, Iceland
Khandivali quarry, Bombay, India
Lonavala, Poona, India
Gortdrum mine, Co. Tipperary, Ireland
Luganure mines, Glendasan, Co. Wicklow, Ireland
Mogul mine, Silvermines district, Co. Tipperary, Ireland
Silvermines district, Co. Tipperary, Ireland
Great Laxey Mine, Laxey, Isle of Man
Agrigento, Sicily, Italy
Baveno, Lago Maggiore, Piedmont, Italy
Buca della Vena mine, Stazzema, Alpe Apuane, Lucca, Tuscany, Italy
Carrara, Tuscany, Italy
Cerchiara manganese mine, Val di Vara, Liguria, Italy
Corcolle, Tivoli, nr Rome, Italy
Montalto di Castro, Viterbo, Italy
Mount Vesuvius, Naples, Campania, Italy
Punta Bianca, La Spezia, Italy
Racalmuto, Girgenti, Sicily, Italy
Scrava Mine, Val Graveglia, Liguria, Italy
Seravezza, Tuscany, Italy
Val Graveglia, Liguria, Italy
Varsi, Parmense Apennines, Italy
Fuka mine, Bicchu-cho, Kawakami, Okayama Pref., Japan
Kvartsitovje Gorki, Kazakhstan
Rudnyi, Kazakhstan
Sarbay silver mine, Rudni, Kusteni Oblast, Kazakhstan
Sokolovskoye, Rudnyi, Kazakhstan
Arzak and Kadyrel deposits, Tuva, Russia
Taehwa mine, Neungam-ri, Angseong-myeon, Chungju, Chungcheongbukdo, South Korea
Chaidarkan, Alai, Kyrgyzstan
Chauvay, Alai, Kyrgyzstan
Khaidarkan deposit, Kyrgyzstan
Allchar, Macedonia
Mt Malosa, Zomba, Malawi
Ahumada & Erupcion mines, Sierra de Los Lamentos, Chihuahua, Mexico
Aquilesas Serdan, Chihuahua, Mexico
Batopilas district, Chihuahua, Mexico
Boleo, Santa Rosalia, Baja California, Mexico
Catorce, San Luis Potosi, Mexico
Charcas, San Luis Potosi, Mexico
Chihuahua, Mexico
Hidalgo de Parral, Chihuahua, Mexico
La Negra mine, Queretaro, Mexico
La Sirena Mine, Guanajuato, Mexico
Los Lamentos Mine, Chihuahua, Mexico
Matehuala, San Luis Potosi, Mexico
Mina Ojuela, Mapimi, Durango, Mexico
Mina Sirena, Guanajuato, Mexico
Naica, Chihuahua, Mexico
San Antonio Mine, Santa Eulalia, Chihuahua, Mexico
Santa Eulalia, Chihuahua, Mexico
Santin mine, Santa Catarina, Cerro de las Fajas, Guanajuato, Mexico
Sombrereta mine, Zacatecas, Mexico
Fez, Atlas Mts., Morocco
Abaneb West mine, Otavi, Namibia
Alt Bobos mine, Otavi, Namibia
Aris quarry, Windhoek, Namibia
Baltika mine, Otavi, Namibia
Berg Aukas, Otavi, Namibia
Friesenberg, Otavi, Namibia
Gross Otavi mine, Otavi, Namibia
Kombat mine, Tsumeb, Otavi, Namibia
Rössing Mine, Rössing, Namibia
Tsumeb mine, Tsumeb, Otavi, Namibia
Tsumeb, Namibia
Watsons Beach, Otago, New Zealand
Glenarm, County Antrim, Northern Ireland
Magheramorne quarry, Co. Antrim, Northern Ireland
Buö, Arendal, Froland, Aust-Agder, Norway
Eg, Kristiansand, Vest-Agder, Norway
Einerkilen, Flåt, Evje, Aust-Agder, Norway
Evje-Ivedal, Iveland, Aust-Agder, Norway
Kongsberg, Buskerud, Norway
Muslim Bagh, Balochistan, Pakistan
Wama, near Toei, South Waziristan, Afghanistan
Casapalca Mine, Lima Dept., Peru
Huaron mine, Pasco Dept., Peru
Milpo mine, Pasco Dept., Peru
Pasta Bueno mine, Ancash Dept., Peru
Machow mine, near Tarnobrzeg, Tarnobrzeg, Poland
Baroca Grande mine, Panasqueira, Beira-Beixa, Portugal
Panasqueira mine, Panasqueira, Beira-Beixa, Portugal
Boldut Mine, Cavnic, Maramures Co., Romania
Herja (Hersza), Chiuzbaia (Kisbanya), Judetul Maramures, Romania
1st Sovietski mine, Dal'negorsk, Primorskiy Kray, Russia
2nd Sovietski mine, Dal'negorsk, Primorskiy Kray, Russia
Aldan Shield, Yakutiya, Siberia, Russia
Bor, Dal'negorsk, Primorskiy Kray, Russia
Dal'negorsk, Primorskiy Kray, Russia
Dal'negorsk, Russia
Danburity, Dal'negorsk, Primorskiy Kray, Russia
Dodo mine, Polar Urals, Tyumen Oblast, Russia
Kadamtschai, Krgizia, Kazakstan
Kirovsky mine, Mt Kukisvumchorr, Khibiny, Kola Peninsula, Russia
Kovdor massif and Khibina massif, Vuonnemi River, Kola Peninsula, Russia
Krokhalin mine, Magadan region, Kolyma River, Russia
Lake Baikal, Siberia, Russia
Murun massif, Davan, Torgo river basin, Aldan Shield, Yakutia, Siberia, Russia
Mutnovskoe, Kamchatka, Russia
near St. Petersburg, Karelia, Russia
Nikolaevskiy, Dal'negorsk, Primorskiy Kray, Russia
Novofrolovskoye Cu deposit, Ural Mts., Russia
Olenitsa River, Murmansk, Russia
Pay Khoy, Silova river, Russia
Polar Urals, Tyumen Oblast, Russia
Puiva, Saranpual, Polar Urals, Russia
Rodnikovoe, Kamchatka, Russia
Sadoviy, Dal'negorsk, Primorskiy Kray, Russia
Sentyabr'skiy, Dal'negorsk, Primorskiy Kray, Russia
Slyudyanka complex, Lake Baikal region, Zabaikalye (Transbaikal), Siberia, Russia
Sokolovskoe Iron Mine, Rudnyym, Kustany Oblast, Russia
Solongo skarn deposit, Buryatia, Russia
Srednyaya Padma deposit, Karelia, Russia
Verchniy Mine, Dal'negorsk, Primorskiy Kray, Russia
Vuoriyarvi massif, North Karelia, Murmansk region, Kola Peninsula, Russia
Ardownie quarry, Monifieth, Tayside, Scotland
Bellsgrove mine, Strontian, Argyll & Bute, Scotland
Boyleston Quarry, Barrhead, Glasgow, Scotland
Broadford (Broadford Gabbro), Broadford, Isle of Skye, Scotland
Carsaig Bay, Carsaig, Isle of Mull, Scotland
Clashgorm mine, Strontian, Argyll & Bute, Scotland
Clyde river, Cardross, Argyll & Bute, Scotland
Coatsgate Quarry, Dumfries & Galloway, Scotland
Coire Buidhe, Glen Creran, Argyll & Bute, Scotland
Eas a Bradain, Luib, Isle of Skye, Scotland
Goat Quarry, Aberdour, Fife, Scotland
Hartfield Moss, Strathclyde, Scotland
Hilderston Quarry, West Lothian, Scotland
Leadhills-Wanlockhead district, Strathclyde/Dumfries and Galloway, Scotland
Lealt, Staffin, Totternish, Isle of Skye, Scotland
Loanhead quarry, near Beith, Strathclyde, Scotland
Mannoch Hill Mine, Lesmahgow, South Lanarkshire, Scotland
Marsco, Sligachan, Isle of Skye, Scotland
Middleshop mine, Strontian, Argyll & Bute, Scotland
Moniack Burn, S. Clunes, Highland, Scotland
Moonen Bay, Isle of Skye, Scotland
Muirshiel Mine, Renfrewshire Heights, Scotland
New Glencrieff Mine, Wanlockhead, Dumfries & Galloway, Scotland
Orrock Quarry, Kirkcaldy, Fife, Scotland
Rhuba a'Mhill, Isle of Islay, Scotland
Sgurr Nam Boc, Isle of Skye, Scotland
Silver Glen, Clackmannanshire, Scotland
Sligachan quarry, Sligachan, Isle of Skye, Scotland
Talisker Bay, Isle of Skye, Scotland
Trearne Quarry, Beith, Ayrshire, Scotland
Whitesmith mine, Strontian, Argyll & Bute, Scotland
Stari Trg Mine, Trepca, Serbia
Trepca, Serbia
Pezinok Mine, Malé Karpaty Mts, Slovakia
Idria, Carniola, Slovenia
Mezica mine, Mezica, Slovenia
Hotazel mine, Kalahari, Cape Province, South Africa
Messina, Transvaal, South Africa
N'Chwaning II mine, Kalahari, Cape Province, South Africa
Nchwaning II mine, near Kuruman, Cape Province, South Africa
Nchwaning Mine, Kalahari, South Africa
Palabora mine, Loolekop, Transvaal, South Africa
Wessels mine, Kalahari Mn field, Kuruman Hill, Cape Province, South Africa
Calpe, Alicante, Spain
Champonille, Spain
Conil, Cadiz, Spain
Mina Berta, Sant Cugat del Vallès-El Papiol, Barcelona, Spain
Mina La Florida, Cantabria, Spain
Villabona mine, near Oviedo, Asturias, Spain
Jakobsberg mine, Filipstad, Nordmark, Värmland, Sweden
Långban mines, Bergslagen ore district, Värmland, Sweden
Arvigo, Val Calanca, Graubünden, Switzerland
Lengenbach quarry, Binntal, Valais, Switzerland
Dara-i-Pioz, Alayskiy Range, Garm, Tajikistan
Mika pegmatite, Rangkul' Highlands, Eastern Pamirs, Tajikistan
"Knox Lime"" quarry, Union, Knox Co., Maine, USA"
"Redstone Green Granite"" quarry, Conway, Carroll Co., New Hampshire, USA"
"Redstone Red Granite"" quarry, Conway, Carroll Co., New Hampshire, USA"
"Rockland-Thomaston Limestone"" quarries, Rockland, Knox Co., Maine, USA"
21st Street, Colorado Springs, El Paso Co., Colorado, USA
700' level, Sta.167, Queens Tunnel of NYC Water Tunnel #3, Woodside, Queens, New York City, New York, USA
79 Mine, Banner District, Gila Co., Arizona, USA
ACCO Stone Quarry, Dublin, Pulaski Co., Virginia, USA
ACCO Stone Quarry, Montgomery Co., Virginia, USA
Ace of Diamonds locality, Fonda, Montgomery Co., New York, USA
Aggregate Industries quarry, Ashland, Middlesex Co., Massachusetts, USA
Alum Cave Bluff, Great Smoky Mts, Tennessee, USA
American Eagle Mine, Elk Mts. Area, Gunnison Co., Colorado, USA
Amethyst lode, Creede, Mineral Co., Colorado, USA
Amity, Orange Co., New York, USA
Andover Iron Mines, Andover, Morris Co., New York, USA
Apache/Bella/Grand Mine etc, Lake Valley District, Sierra Co., New Mexico, USA
Argentine Tunnel, Ouray, Ouray Co., Colorado, USA
Arlington Quarry etc, Leesburg, Loudoun Co., Virginia, USA
Asbestos Peak, Globe, Gila Co., Arizona, USA
B.B.#7 mine, Norway, Oxford Co., Maine, USA
Baggs, Carbon Co., Wyoming, USA
Bald Knob, Galax, Alleghany Co., North Carolina, USA
Balmat, St. Lawrence Co., New York, USA
Balmat-Edwards District, Governor, St.Lawrence Co., New York, USA
Barringer Hill, Blufton, Llano Co., Texas, USA
Basin mine, Phippsburg, Sagadahoc Co., Maine, USA
Basin Vesuvianite locality, Phippsburg, Sagadahoc Co., Maine, USA
Bayer-Mingolla Quarry, Ashland, Norfolk Co., Massachusetts, USA
Beacon Pole Hill/Iron Mine Hill/Diamond Hill etc, Cumberland Area, Providence Co., Rhode Island, USA
Bear Creek Quarry, Drain, Douglas Co., Oregon, USA
Bear Lodge mining district, Crook Co., Wyoming, USA
Beaver Valley Quarry, Shine, Jefferson Co., Washington, USA
Beech Creek Quarry, Mount Vernon, Grant Co., Oregon, USA
Benchmark Quarry, St. Johnsville, Montgomery Co., New York, USA
Benitoite/Dallas/Victor/New Idria Mines, New Idria Mining District, San Benito & Fresno Counties, California, USA
Bennett Quarry, Buckfield Township, Oxford Co., Maine, USA
Benson Mines, Newton Falls/Star Lake, St.Lawrence Co., New York, USA
Berry Ledge locality, Cornish, York Co., Maine, USA
Bershire Talc Company mines, Hinsdale, Berkshire Co., Massachusetts, USA
Betts Manganese Mine, Plainfield, Hampshire Co., Massachusetts, USA
Betty O'Neal, Nevada, USA
Big Tree Creek, Yacolt, Clark Co., Washington, USA
Bisbee, Cochise Co., Arizona, USA
Black Hawk district, Grant Co., New Mexico, USA
Black Hawk mine, Black Hawk district, Grant Co., New Mexico, USA
Black Rock mine, Yuma Co., Arizona, USA
Blanchard Mine, Bingham, Socorro Co., New Mexico, USA
Bloomington Crushed Stone Quarry, Monroe Co., Indiana, USA
Blue Bell Mine, Baker, San Bernardino Co., California, USA
Boron Borate Mine, Boron/Kramer District, Kern Co., California, USA
Bound Brook Quarry, Bridgewater, Somerset Co., New Jersey, USA
Bradley Iron mine, Stony Point, Rockland Co., New York, USA
Branchville Mica mine, Branchville, Fairfield Co., Connecticut, USA
Brandywine Quarry, Willimgton, New Castle Co., Delaware, USA
Brant Lake Area, Thurman, Warren Co., New York, USA
Bridgeport Dolomite Quarry, Bridgeport, Montgomery Co., Pennsylvania, USA
Brinton's Quarry etc, Chester, Delaware Co., Pennsylvania, USA
Bristol Copper Mine, Bristol, Hartford Co., Connecticut, USA
Brooks Hollow Dam, Bear Mountain State Park, Orange Co., New York, USA
Brown-Tipton Mine, Mosheim, Greene Co., Tennessee, USA
Browns Creek Area, Natrop/Mount Antero, Chaffee Co., Colorado, USA
Brushby Creek Mine, Reynolds Co., Missouri, USA
Brushy Creek mine, Reynolds Co., Missouri, USA
Bryant Pond Granite quarry, Woodstock, Oxford Co., Maine, USA
Buckwheat mine dump, Franklin, Sussex Co., New Jersey, USA
Burnt Cabin Creek, Spray, Wheeler Co., Oregon, USA
Butte General Area, Montana, USA
C-thon Prospect, Stanley District, Graham Co., Arizona, USA
Caanan, Litchfield Co., Connecticut, USA
Callahan mine, Brooksville, Hancock Co., Maine, USA
Calumet & Hecla Mine, Calumet, Houghton Co., Michigan, USA
Calumet, Houghton Co., Michigan, USA
Camp Bird/Dunmore/Monarch Mtn/Portland Mines et., Ouray Area, Ouray Co., Colorado, USA
Camp Hinds locality, Raymond, Cumberland Co., Maine, USA
Camp Verde, Yavapai Co., Arizona, USA
Campbell shaft, Bisbee, Cochise Co., Arizona, USA
Canaan Lime Quarry, Falls Village, Litchfield Co., Connecticut, USA
Canoe Creek, Blair Co., Pennsylvania, USA
Carson Hill/New Melones Lake, Calaveras Co., California, USA
Casey Co., Kentucky, USA
Catawba Valley, Virginia, USA
Catnip Hill Quarry, Jessamine Co., Kentucky, USA
Cave-in-Rock, Hardin Co., Illinois, USA
Caverns of Sonora, Edwards Plateau, Sutton Co., Texas, USA
Cavetown Quarry, Cavetown, Washington Co., Maryland, USA
Cayuga & Seneca Lakes, Seneca Co., New York, USA
Cedar Hill Quarry, Wakefield, Lancaster Co., Pennsylvania, USA
Centennial Mine, Calumet, Houghton Co., Michigan, USA
Chalk Mountain Mine, Fallon Area, Churchill Co., Nevada, USA
Chantilly Quarry, Arcola, Loudoun Co., Virginia, USA
Chester Emery mine, Chester, Hampden Co., Massachusetts, USA
Chicago Mine, Iron River, Iron Co., Michigan, USA
Chino ore body, Central Mining District, Grant Co., Nevada, USA
Chittenango Falls, Madison Co., New York, USA
Christmas Mine, Hayden, Gila Co., Arizona, USA
Chute prospect, Casco, Cumberland Co., Maine, USA
Cimmaron & Bradley Lodes, Smuggler Vein, Smuggler Union Consolidated mine, Marshall Basin, Telluride District, San Miguel Co., Colorado, USA
Clay Center, Ottawa Co., Ohio, USA
Clearspring/Erie/Pinhook/Zelma etc, Lawrence Co., Indiana, USA
Clegg Mine, Bennett, Chatam Co., North Carolina, USA
Clip mine, Yuma, Yuma Co., Arizona, USA
Cloverdale Russian River Area, Mendocino Co., California, USA
Cochetopa Hills Area, Saguache Co., Colorado, USA
Coeur d'Alene, Mullan Canyon Creek Area, Idaho, USA
Colby Farm Lime-Marble quarry, Phippsburg, Sagadahoc Co., Maine, USA
Columbus, Cherokee Co., Kansas, USA
Commercial Mine, Georgetown, Grant Co., New Mexico, USA
Comstock Lode, Virginia City, Storey Co., Nevada, USA
Conklin quarry, Lincoln, Providence Co., Rhode Island, USA
Cooks Peak, Luna Co., New Mexico, USA
Copper Falls mine, near Eagle Harbor, Keweenaw Co., Michigan, USA
Copper Harbor, Lake Manganese, Keeweenaw Co., Michigan, USA
Copper Harbour, near Lake Manganese, Keweenaw Co., Michigan, USA
Copper Mountain Area, Sulzer/Prince of Wales Island, Alaska, USA
Copper Queen Mine, Bisbee, Cochise Co., Arizona, USA
Coral Hollow, 11miles ESE of Livermore, Alameda Co., California, USA
Corydon Stone Co. Quarry, Corydon, Harrison Co., Indiana, USA
Courtland-Gleeson District, Cochise Co., Arizona, USA
Coyote Peak, Orick, Humboldt Co., California, USA
Crestmore Quarry, Crestmore, Riverside Co., California, USA
Crystal Pass, Ray, Pinal Co., Arizona, USA
Davis pyrite mine, Rowe, Franklin Co., Massachusetts, USA
Day Hill locality, Cornish, York Co., Maine, USA
De Lamar, Owyhee Co., Idaho, USA
Dead Indian Hill, Park Co., Wyoming, USA
Debolt Quarry, Richmond, Wayne Co., Indiana, USA
Delta Carbonate quarry, York Co., Pennsylvania, USA
Denton mine, Harris Creek District, Hardin Co., Illinois, USA
Devil's Backbone, North Fork John Day River, Grant Co., Oregon, USA
Devil's Corral, near Black Rock Desert, Humboldt Co., Nevada, USA
Dexter quarry, Lincoln, Providence Co., Rhode Island, USA
Diamond Acres locality, Fonda, Montgomery Co., New York, USA
Diamond Hill/Sneech Pond Copper Mines, Cumberland, Rhode Island, USA
Dillsburg, York Co., Pennsylvania, USA
Dorsey Mansion Area, Point of Rocks Mesa, Socorro Co., New Mexico, USA
Dragon Cement Quarry - North Pit, Thomaston, Knox Co., Maine, USA
Dragon Cement Quarry - South Pit, Thomaston, Knox Co., Maine, USA
Dubuque Area, Dubuque Co., Iowa, USA
Duff quarry, Huntsville, Logan Co., Ohio, USA
Durango, La Plata Co., Colorado, USA
East Fork, Gila River, Grant Co., New Mexico, USA
East Tintic Mine, Juab Co., Utah, USA
Eastern Products Quarry, Winfield, Union Co., Pennsylvania, USA
Eastman Hill Tin prospects, Jackson, Carroll Co., New Hampshire, USA
Ecton Mine etc, Perkiomenville Area, Montgomery Co., Pennsylvania, USA
Eight Mile Park, Eight Mile Park pegmatite district, Fremont Co., Colorado, USA
El Portal Area, Mariposa Co., California, USA
Eldorado Mine, Indio, Riverside Co., California, USA
Elk Creek, Meade Co., South Dakota, USA
Elmwood mine, Carthage, Smith Co., Tennessee, USA
Erie Canal excavations, Lockport and Rochester, Monroe Co., New York, USA
Erie Railroad Cut (Bergen Archways), Jersey City, Hudson Co., New Jersey, USA
Esterbrook copper district, Albany Co., Wyoming, USA
Estes mine, Baldwin, Cumberland Co., Maine, USA
Everett, Bedford Co., Pennsylvania, USA
Evergreen mine, near Apex, Gilpin Co., Colorado, USA
Faber Zinc Mine, Faber, Albe Marle Co., Virginia, USA
Faircloth/Dean/Fairfield/Twin Chimney Mines, Munday's Landing, Mercer Co., Kentucky, USA
Fernando Mine/etc, Darwin District, Inyo Co., California, USA
Flambeau mine, Ladysmith, Rusk Co., Wisconsin, USA
Fogle Quarry, Ottawa, Kansas, USA
Foote Spodumene Mine, Kings Mountain, Cleveland Co., North Carolina, USA
Franciscan Formation, Panoche Valley, California, USA
Franconia Iron mine, Sugar Hill, Grafton Co., New Hampshire, USA
Frankfort, Franklin Co., Kentucky, USA
Franklin Mine, Franklin, Houghton Co., Michigan, USA
French Creek Mines, Knauertown, Chester Co., Pennsylvania, USA
Frontier Quarry, Lockport, Niagara Co., New York, USA
Gale Canyon/Golden/Drew Hill, Golden, Jefferson Co., Colorado, USA
Galena General Area, Jo Davies Co., Illinois, USA
Galena/Baxter Springs/Lawton, Cherokee Co., Kansas, USA
Gate Vein, Mercer Co., Kentucky, USA
General Area, Jasper & Newton counties, Missouri, USA
General Area, Picher/Commerce/Quapaw/Miami/Peoria, Ottowa Co., Oklahoma, USA
Genoa, Ottawa Co., Ohio, USA
Getchell Mine, Golconda, Humbolt Co., Nevada, USA
Glendon, Moore Co., North Carolina, USA
Gold Hill District, Jackson Co., Oregon, USA
Gold Hill mine, Tooele Co., Utah, USA
Gold Quarry mine, Carlin Trend, Eureka Co., Nevada, USA
Golden Horn Batholith, Washington Pass, Okanogen Co., Washington, USA
Goldie carbonatite, Fremont Co., Colorado, USA
Goodall/Webster, Sanford, York Co., Maine, USA
Goose Creek Quarry, Loudoun Co., Virginia, USA
Gordonsville zinc Mines, Tennessee, USA
Goshen Hole, Platte Co., Wyoming, USA
Goshen, Lane Co., Oregon, USA
Grace Mine, Morgantown, Berks Co., Pennsylvania, USA
Grace Walker Mine etc, Picher/Miami, Ottawa Co., Oklahoma, USA
Grand Deposit mine, White Pine Co., Nevada, USA
Grand Reef mine, Laurel Canyon, Aravaipa mining distr., Graham Co., Arizona, USA
Granite Mt Quarry #1, Pulaski Co., Arkansas, USA
Graphic mine, Magdalena District, Socorro Co., New Mexico, USA
Great Notch Quarry, Little Falls, Passaic Co., New Jersey, USA
Green Million Vein, Shaker Creek, Mercer Co., Kentucky, USA
Grey Horse Mine, Kay Spring Canyon, Arizona, USA
Halls Gap, Lincoln Co., Kentucky, USA
Hamburg Mine, Trigo Mts., Yuma Co., Arizona, USA
Hamilton, Steuben Co., Indiana, USA
Hampden quarry, Westfield, Hampden Co., Massachusetts, USA
Hanover Quarry, Hanover, Adams Co., Pennsylvania, USA
Hansen Creek, King Co., Washington, USA
Harding Mine, Dixon, Taos Co., New Mexico, USA
Harriman prospect, Union, Knox Co., Maine, USA
Harris Quarry, Lincoln, Providence Co., Rhode Island, USA
Hartville iron-copper district, Platte Co., Wyoming, USA
Hartville Uplift Copper district, Goshen Co., Wyoming, USA
Harvard Quarry, Greenwood Township, Oxford Co., Maine, USA
Hastings Farm locality, Fonda, Montgomery Co., New York, USA
Haverstraw, Rockland Co., New York, USA
Hawthorne, Mineral Co., Nevada, USA
Helena/American Bar/Blue Spinel Quarries etc, General Area, Lewis & Clark Co., Montana, USA
Hiddenite, Alexander Co., North Carolina, USA
Hill Top Mine, Cochise Co., Arizona, USA
Hilltop mine, Cochise Co., Arizona, USA
Homestake Mine etc, Ambrosia Lake District, McKinley Co., New Mexico, USA
Homestake Mine, Creede, MineralCo., Colorado, USA
Horseshoe Island Calc-Silicate locality, Winthrop, Kennebec Co., Maine, USA
Howard-Montgomery quarry, Howard Co., Maryland, USA
Howe Hill Nickel mine, Rumford, Oxford Co., Maine, USA
Humbolt Range, Mill City, Pershing Co., Nevada, USA
Hunting Hill quarry, Rockville, Montgomery Co., Maryland, USA
Hyatt Mine, Talcville, St. Lawrence Co., New York, USA
Idarado, San Miguel Co., Colorado, USA
Iron Hill, Cebolla Creek area, Powderhorn, Gunnison Co., Colorado, USA
Iron Mountain Mine, Iron Mountain, Missouri, USA
Iron Springs District, Cedar City Area, Utah, USA
Irving Materials quarry, Anderson, Madison Co., Indiana, USA
Italian Mt. Area, Aspen, Gunnison Co., Colorado, USA
Jackson Canyon, Humbolt Range, Pershing Co., Nevada, USA
Jackson/Superior Mines etc, Negaunee, Marquette Co., Michigan, USA
Jacksonwald, Berks Co., Pennsylvania, USA
James Creek, Jamestown, Boulder Co., Colorado, USA
Jamestown mine, Tuolumne Co., California, USA
Jamestown, Newport Co., Rhode Island, USA
Jarbridge, Elko Co., Nevada, USA
Jensen Quarry, Riverside Co., California, USA
Johnsburg Area, Warren Co., New York, USA
Joplin, Jasper Co., Missouri, USA
Josephine Creek, Galice District, Josephine Co., Oregon, USA
Josephine Horizon, Metaline District, Washington, USA
Juanita Mine, Magdalena district, Socorro Co., New Mexico, USA
Jumbo Copper mine, Prince of Wales Island, Alaska, USA
Kelley Mine, Magdalena District, Socorro Co., New Mexico, USA
Keokuk, Lee Co., Iowa, USA
Keweenawan copper deposit, Lake Superior, Michigan, USA
Keystone Quarry, Cornog, Chester Co., Pennsylvania, USA
King Mountain Area, Crowders, Gaston Co., North Carolina, USA
Kingsbridge, Bronx Co., New York, USA
Kirwin copper district, Park Co., Wyoming, USA
La Junta, Otero Co., Colorado, USA
La Motte/Missouri Cobalt Mine, Fredrick, Madison Co., Missouri, USA
LaFlamme quarry, Minot, Androscoggin Co., Maine, USA
Lambertville, Mercer Co., New Jersey, USA
Lane & Sons Traprock quarrys, Westfield, Hampden Co., Massachusetts, USA
Lane Quarry, Westfield, Hampden Co., Massachusetts, USA
Laurel Hill (Snake Hill), Secaucus/Bergen Hill Area, Hudson Co., New Jersey, USA
Laytonville Quarry, Laytonville, Mendocino Co., California, USA
LCA mine, Bessermer City, Gaston Co., North Carolina, USA
Lee Lime quarry, Lee, Berkshire Co., Massachusetts, USA
Liberty Bell and Washington Pass, Okanogan Co., Washington, USA
Liberty Copper/Dolly Hyde Copper Mines, Libertytown, Fredrick Co., Maryland, USA
Lime Crest Quarry, Sparta, Sussex Co., New Jersey, USA
Lime Quarry, Bolton, Worcester Co., Massachusetts, USA
Lincoln, Providence Co., Rhode Island, USA
Lithonia, DeKalb Co., Georgia, USA
Little Mt uranium district, Big Horn Co., Wyoming, USA
Lockport Quarry, Lockport, Niagara Co., New York, USA
Lone Jack Quarry, Glasgow, Rockbridge Co., Virginia, USA
Loudville Lead Mine, Loudville, Hampshire Co., Massachusetts, USA
Lower New Street quarry, Paterson, Passaic Co., New Jersey, USA
Lubec Lead mine, Lubec, Washington Co., Maine, USA
Lucky Peak Dam, Ada Co., Idaho, USA
Lutz Quarry, Oshkosh, Wisconsin, USA
Lynch quarry, Berkeley, Cumberland, Providence Co., Rhode Island, USA
Macy Mine, Hillsboro district, Sierra Co., New Mexico, USA
Magdalena district, Socorro Co., New Mexico, USA
Magma Mine, Superior, Pinal Co., Arizona, USA
Magmont mine, Bixby, Iron Co., Missouri, USA
Magmount mine, Bixby, Missouri, USA
Magnet Cove, Hot Spring Co., Arkansas, USA
Mammoth-St. Anthony mine, Tiger, Pinal Co., Arizona, USA
Mamouth Mine, Tiger, Pinal Co., Arizona, USA
Mandarin mine, Yuma Co., Arizona, USA
Manton Avenue quarry, Providence, Providence Co., Rhode Island, USA
Manton, Providence Co., Rhode Island, USA
Manville quarry, Cumberland, Providence Co., Rhode Island, USA
Maple Grove, Seneca Co., Ohio, USA
Marie Mine, Carbon Co., Montana, USA
Marion/Salem/Princeton, Crittendon Co., Kentucky, USA
Mariposa mine, Terlingua district, Brewster Co., Texas, USA
Martin Marietta Quarry, Hickory, Catawba Co., North Carolina, USA
Massachusetts Talc Company mine, Rowe, Franklin Co., Massachusetts, USA
Masslite quarry, Plainville, Norfolk Co., Massachusetts, USA
Maybee, Monroe Co., Michigan, USA
McCauliff Quarry/Rollston Hill, Fitchburg, Worchester Co., Massachusetts, USA
McCormick (Ide Ledge) quarry, East Providence, Providence Co., Rhode Island, USA
McLear Quarry, DeKalk Township, St.Lawrence Co., New York, USA
McManus Gulch, Clear Creek Co., Colorado, USA
Meckley's Quarry, Mandata, Northumberland Co., Pennsylvania, USA
Medicine Bow Mts., Gold Hill, Wyoming, USA
Memphis Mine, Organ district, Dona Ana Co., New Mexico, USA
Mendevil mine, Yuma Co., Arizona, USA
Meshberger Stone quarry, Columbus, Bartholomew Co., Indiana, USA
Mex-Tex mine, Socorro Co., New Mexico, USA
Mid Continent mine, Miami, Ottawa Co., Oklahoma, USA
Middletown Area, Middlesex Co., Connecticut, USA
Midnight Mine, Pitkin Co., Colorado, USA
Millington quarry, Millington, Somerset Co., New Jersey, USA
Mineral, Mineral Co., Virginia, USA
Minerva #1 Mine, Harris Creek District, Hardin Co., Illinois, USA
Mitchell Mt. mine, Newfield, York Co., Maine, USA
Modoc Mine, Dona Ana Co., New Mexico, USA
Mohawk Mine, Goldfield, Esmeralda Co., Nevada, USA
Mohawk mine, San Bernardino Co., California, USA
Monroe, Union Co., North Carolina, USA
Montclair Quarry, Montclair, Passaic Co., New Jersey, USA
Morristown Area, Maricopa Co., Arizona, USA
Mount Washington, Bullit Co., Kentucky, USA
Mt Belvidere mines, Lowell & Eden Mills, Orleans Co., Vermont, USA
Mt Mica mine, Paris, Oxford Co., Maine, USA
Mt. Baldy & Gold Mt., Ohio, Utah, USA
Myers, Treasure Co., Montana, USA
Nakeye Mine, Derry District, Sierra Co., New Mexico, USA
near Gordon Gulch, Owyhee Dam Area, Malheur Co., Oregon, USA
near Putney, Vermont, USA
New Cornelia Mine, Ajo, Pima Co., Arizona, USA
New Market Mine, New Market, Tennessee, USA
New Water Mountains, Yuma Co., Arizona, USA
Newport, Newport Co., Rhode Island, USA
NJ Zinc Co./Bertha Mine, Austinville, Wythet Co., Virginia, USA
North Mountain Serpentine locality, Cheshire, Berkshire Co., Massachusetts, USA
North Table Mountain, Golden Area, Jefferson Co., Colorado, USA
North Vernon, Jennings Co., Indiana, USA
Northumberland Mine, Toquima Range Area, Nye Co., Nevada, USA
O&G quarry, Southbury, New Haven Co., Connecticut, USA
Oak Grove Fork, Clackamas River, Clackamas Co., Oregon, USA
Old Dominium, Gila Co., Arizona, USA
Old Guard Mine, Tombstone, Cochise Co., Arizona, USA
Old Strontian Mine, Schoharie, Schoharie Co., New York, USA
Old Yuma Mine, Tuscon Area, Pima Co., Arizona, USA
Olmstedville, Essex Co., New York, USA
Opp Mine, Jackson, Jackson Co., Oregon, USA
Orderville, Kane Co., Utah, USA
Ore Knob Copper Mine, Ashe, Ashe Co., North Carolina, USA
Osborne Soapstone quarry, Blandford, Hampden Co., Massachusetts, USA
Osceola/Mohawk/Iroquois/Clark/Delaware Mine etc, Keweenaw Peninsula, Michigan, USA
Oskaloosa, Mahaska Co., Iowa, USA
Owingsville, Bath Co., Kentucky, USA
Owl Canyon, Larimer Co., Colorado, USA
Oxbow, St. Lawrence Co., New York, USA
Oxford Stone Company, Bridgeville, Cumberland Co., New Jersey, USA
Ozark-Mahoning Mine, Cave-in-rock & Rosiclare, Hardin Co., Illinois, USA
Pacific mine, Yuma Co., Arizona, USA
Pack Rat Mine, Carbon Co., Montana, USA
Paoli Area, Garvin Co., Oklahoma, USA
Papago mine, Yuma Co., Arizona, USA
Park City & Alta, Clayton Peak, Utah, USA
Park City, Summit Co., Utah, USA
Parker shaft, Franklin, Sussex Co., New Jersey, USA
Parsonsfield Vesuvianite locality, Parsonsfield, York Co., Maine, USA
Paul Frank Quarry, North Vernon, Indiana, USA
Pea Ridge mine, Sullivan Co., Missouri, USA
Pease Mt. locality, Cornish, York Co., Maine, USA
Perry Trapprock locality, Perry, Washington Co., Maine, USA
Pfitzer Quarry, Adams, Berkshire Co., Massachusetts, USA
Phoenix mine, near Eagle Harbor, Keweenaw Co., Michigan, USA
Pikes Peak, Teller Co., Colorado, USA
Pine Island, Orange Co., New York, USA
Pints Quarry/Waterloo lead and zinc Mines, Dubuque, DubuqueCo., Iowa, USA
Piper Hill prospect, Newfield, York Co., Maine, USA
Pipestone Pass Area, Bald Mts. Area, Jefferson Co., Montana, USA
Pitts-Tenney mine, Minot, Androscoggin Co., Maine, USA
Platteville Area, Iowa Co., Wisconsin, USA
Poorhouse Quarry, Embrieville, Chester Co., Pennsylvania, USA
Portage Lake Lava area, Keweenaw Co., Michigan, USA
Portland/Vindicator/Golden Cycle etc, Cripple Creek, El Paso Co., Colorado, USA
Portsmouth, Newport Co., Rhode Island, USA
Prospect Park Quarry, Haledon, Passaic Co., New Jersey, USA
Provence Mt. locality, Newfield, York Co., Maine, USA
Providence, Providence Co., Rhode Island, USA
Purple Passion Mine, Wickenberg, Yavapai Co., Arizona, USA
Putney, Windham Co., Vermont, USA
Questa Mine, Taos Co., New Mexico, USA
Quick Silver Mine etc, Organ Mts. Area, Dona Ana Co., New Mexico, USA
Quincy mine, Hancock, Houghton Co., Michigan, USA
Radcliff, Hardin Co., Kentucky, USA
Ray mine, Pina Co., Arizona, USA
Reading Talc Mine, Reading, Windsor Co., Vermont, USA
Red Cloud Mine, Trego Mts., La Paz Co., Arizona, USA
Red Mountain Formation, Birmingham, Jefferson Co., Alabama, USA
Redstone Granite quarry, Westerly, Washington Co., Rhode Island, USA
Rin Mountain, Wausau, Marathon Co., Wisconsin, USA
Rincon Quarry, Rincon, Dona Ana Co., New Mexico, USA
Ringwood Iron Mine, Ringwood, Passaic Co., New Jersey, USA
Road Cut Calcite locality, Mexico, Oxford Co., Maine, USA
Rockport, Cape Ann, Essex Co., Massachusetts, USA
Rockville, Montgomery Co., Maryland, USA
Roncari quarry, East Granby, Hartford Co., Connecticut, USA
Rose mine, Grant Co., New Mexico, USA
Rosiclaire, Hardin Co., Illinois, USA
Ross Hannibal mine, Lawrence Co., South Dakota, USA
Rossie lead mines, St. Lawrence Co., New York, USA
Royal Gorge Area, Fremont Co., Colorado, USA
Rumford Falls locality, Rumford, Oxford Co., Maine, USA
Rush, Marion Co., Arkansas, USA
Rutherford Mines, Amelia Court House, Virginia, USA
Sacremento Mines, Mercur, Tooele Co., Utah, USA
San Manuel mine, Pinal Co., Arizona, USA
San Pedro Mine, Hiriart Hill, San Diego Co., California, USA
Schwartzwalder Mine, Golden Area, Jefferson Co., Colorado, USA
Scrub Oaks Mine, Dover, Morris Co., New Jersey, USA
Searles Lake, San Bernardino Co., California, USA
Sebago Lake Village Lime-Marble quarries, Standish, Cumberland Co., Maine, USA
Shaft #10, Quabbin Aquaduct, Hardwick, Worcester Co., Massachusetts, USA
Showalter Quarry/Blueball Stone Co., East Earle Township/Lancaster, Lancaster Co., Pennsylvania, USA
Shullsburg, Lafayette Co., Washington, USA
Silver Glance mine, Silent district, Arizona, USA
Silver Hill Mine, Tuescon arera, Pima Co., Arizona, USA
Silver Hill, Davidson Co., North Carolina, USA
Silver Plume, Colorado, USA
Skookumchuck dam, Bucoda & Tenino, Thurston Co., Washington, USA
Smith Granite quarry, Westerly, Washington Co., Rhode Island, USA
Smuggler Vein, Smuggler Union Consolidated mine, Marshall Basin, Telluride District, San Miguel Co., Colorado, USA
Snake River/Peru, Montezuma, Summit Co., Colorado, USA
Sneech Pond Copper mine, Cumberland, Providence Co., Rhode Island, USA
Snow/Sackett/Marcia/Old/Melvin/Wright Mines etc, Chester, Hampden Co., Massachusetts, USA
Snowbird mine, South Pass-Atlantic City gold district, Fremont Co., Wyoming, USA
Snowbird/Mary Ellen Mine, Atlantic City District, Fremont Co., Wyoming, USA
Somerville, Middlesex Co., Massachusetts, USA
Southwest mine, Bisbee, Cochise Co., Arizona, USA
Specialty Minerals quarry, Adams, Berkshire Co., Massachusetts, USA
Spor Mt., Nevada, USA
Sprakers, Montgomery Co., New York, USA
Spruce Peak deposit, King Co., Washington, USA
St. Louis, St. Louis Co., Missouri, USA
St.Louis, St.Louis Co., Missouri, USA
Starrett mines, Warren, Knox Co., Maine, USA
State Route 30 locality, Long Lake, Hamilton Co., New York, USA
Steamboat Springs, Washoe Co., Nevada, USA
Stephenson-Bennett mine, Organ District, Dona Ana Co., New Mexico, USA
Sterling Hill and Franklin Furnace, Sussex Co., New Jersey, USA
Sterling Mine, Antwerp, St.Lawrence Co., New York, USA
Stewart Mine, Butte, Silver Bow Co., Montana, USA
Stillwater complex, Benbow Area, Stillwater Co., Montana, USA
Stockbridge Valley Brown Iron Ore District, Berkshire Co., Massachusetts, USA
Stoney Point, Sharpes Township, Alexander Co., North Carolina, USA
Sugar Grove, Pendelton Co., West Virginia, USA
Sullivan Granite quarry, Bradford, Westerly, Washington Co., Rhode Island, USA
Summit Mine, Broadwater Co., Montana, USA
Sunlight copper district, Park Co., Wyoming, USA
Sunnyside mine, Silverton Mining District, Howardsville, San Juan Co., Colorado, USA
Sunshine mine, Kellogg, Shoshone Co., Idaho, USA
Surl, Person Co., North Carolina, USA
Susanville, Grant Co., Oregon, USA
Sweet Home Mine, Alma District, Park Co., Colorado, USA
Sweetwater Mine, Ellington, Reynolds Co., Missouri, USA
Talcville Quarries, St.Lawrence Co., New York, USA
Tamminen mine, Greenwood, Oxford Co., Maine, USA
Telluride District, San Miguel Co., Colorado, USA
Terry Borate Mine, Inyo Co., California, USA
Thomaston Dam Railroad Cut, Thomaston, Litchfield Co., Connecticut, USA
Thomaston dam, Thomaston, Litchfield Co., Connecticut, USA
Thomasville, Pennsylvania, USA
Tilcon Capaldi quarry, Acushnet, Bristol Co., Massachusetts, USA
Tilly Foster Mine, Brewster, Putnam Co., New York, USA
Tintic Standard mine, Dividend, Utah Co., Utah, USA
Topaz cove, Thomas Range, Juab Co., Utah, USA
Trap rock Quarry, Chesire, New Haven Co., Connecticut, USA
Treadwell Mine, Douglas Island opposite Junea City, SE Juneau Area, Alaska, USA
Treasure Hawk Mine, Ophir District, Tooele Co., Utah, USA
Treasure Mountain Diamond mine, Little Falls, Herkimer Co., New York, USA
Tri-State District, Missouri, USA
Trotter mine, Franklin Furnace, Sussex Co., New Jersey, USA
Tungsten Mine, Trumbull, Fairfield Co., Connecticut, USA
Tuscarora mine, near Randolph, Crawford Mts, Rich Co., Utah, USA
Twin Buttes, Pima Co., Arizona, USA
Unnamed Lime-Marble quarry #1, Gorham, Cumberland Co., Maine, USA
Unnamed Lime-Marble quarry #2, Gorham, Cumberland Co., Maine, USA
Unnamed Scheelite prospect, Newfield, York Co., Maine, USA
Upper New Street Quarry, Paterson, Passaic Co., New Jersey, USA
Val Verde (tunnel), California, USA
Valley Quarry, Shippensburg, Cumberland Co., Pennsylvania, USA
Van Stone Mine Area, Stevens Co., Washington, USA
Vanadium King Mine, Camp Signal, San Bernardino Co., California, USA
Vermiculite Prospects, Big Sandy Creek, Hill Co., Montana, USA
Verplanck, Westchester Co., New York, USA
Viburnum No 27 mine, Iron Co., Missouri, USA
Victory Mine, Cave-in-Rock, Hardin Co., Illinois, USA
Wah Wah Mountain range, Utah, USA
Waisanen mine, Greenwood, Oxford Co., Maine, USA
Walker Valley, Skagit Co., Washington, USA
Walker vein, Caldwell Stone Company Quarry, Danville, Boyle Co., Kentucky, USA
Wallace Stone Plant, Bayport, Huron Co., Michigan, USA
Warren Farm, Alexander Co., North Carolina, USA
Warren Nickel prospect, Warren, Knox Co., Maine, USA
Warren, Carbon Co., Montana, USA
Warwick, Orange Co., New York, USA
Wausau Plateau, Rib Mountain, Marathon Co., Wisconsin, USA
Wentworth Farm locality, Parsonsfield, York Co., Maine, USA
West Creek, Brooklyn Hts, Ohio, USA
Westerly, Washington Co., Rhode Island, USA
Wheatfield Iron Mine, Wheatfield/Sinking Spring, Berks Co., Pennsylvania, USA
White Caps/Outlaw Mines etc, Manhattan, Nye Co., Nevada, USA
White Mt. Batholith Pegmatite District, Carroll Co., New Hampshire, USA
White Pine mine, Ontonagan Co., Michigan, USA
Wilbur Springs, Colusa Co., California, USA
Willard mine, Lovelock, Pershing Co., Nevada, USA
Wilson's Quarry, Plainfield, Union Co., New Jersey, USA
Winslow Tin mine, Winslow, Kennebec Co., Maine, USA
Wolf Creek Pass, Mineral Co., Colorado, USA
Wood River District, Hailey, Blaine Co., Idaho, USA
Woodbury Area quarries, Cannon Co., Tennessee, USA
Woodward Iron Mines, Vance, Tuscaloosa Co., Alabama, USA
Yaquina Head Quarry, Agate Beach, Lincon Co., Oregon, USA
Yerington District, Lyon Co., Nevada, USA
Yerington, Lyon Co., Nevada, USA
ZCA Mine, Pierrepont, St. Lawrence Co., New York, USA
Zinc Hill Mine, Darwin Area, Inyo Co., California, USA
A4119 roadcutting, south of Llantrisant, Mid Glamorgan, Wales
Aberllyn mine, Llanrwst, Bettws-y-coed, Gwynedd, Wales
Blaengwynlais quarry, Mid Glamorgan, Wales
Bryn-gwiog Mine, Halkyn Mt, Clwyd, Wales
Drws-y-Coed mine, Llandwrog, Gwynedd, Wales
Esclusham Mountain, Minera, Wales
Esgair Hir mine, Talybont, Ceulanymaesmawr, Dyfed, Wales
Great Ormes Head Mine, Llandudno, Wales
Hendre Felen Mine, Ysbyty Ystwyth, Dyfed, Wales
Hendre quarry, Glyn Ceiriog, Clwyd, Wales
Hendy quarry, LLantrisant, Mid Glamorgan, Wales
Henfwlch Mine, Talybont, Ceulanymaesmawr, Dyfed, Wales
Llanelwedd Quarry, Builth Wells, Powys, Wales
Llangynog Mine, Llangynog, Powys, Wales
Llanharry Hematite Mine,Llanharry, Mid Glamorgan, Wales
Llechwedd Helyg mine, Tir-y-Mynach, Dyfed, Wales
Logau-las-Lode, Ysbyty Ystwyth, Dyfed, Wales
Machen Quarry, Machen, Mid Glamorgan, Wales
Manod Quarry, Blaenau, Festinog, Gwynedd, Wales
Minera (mines), Wrexham, Wales
Nant-y-Cagel mine (Eagle Brook), Talybont, Ceulanymaesmawr, Dyfed, Wales
Nantiago Mine, Hafren Forest, Powys, Wales
Parc Mine, Wrexham, Wales
Penrhiw mine, Ystumtuen, Dyfed, Wales
Taffs Well quarry, Cardiff, Wales
Ton Mawr Quarry, Pentyrch, Cardiff, South Glamorgan, Wales
Trecastell Mine, Conway, Gwynedd, Wales
Kipushi mine, Lubumbashi, Shaba, Zaire
Mashamba West mine, Shaba, Zaire
Mindouli, Congo, Zaire
Ruashi, Shaba, Zaire

Usos y apliaciones

Los cristales límpidos, como el espato de Islandia, se han empleado en la fabricación de prismas polarizadores (nicol) para microscopios petrográficos, que en la actualidad han sido sustituidos por los menos costosos filtros polarizadores.

Las masas compactas de calcita (calizas y mármoles), se emplean en construcción, bien como materia prima básica para la obtención del cemento, bien como rocas ornamentales. En la industria química se usa para la fabricación de sosa cáustica, anhídrido carbónico y cloruro de calcio; en metalurgia se emplea como fundente y en la industria de los fertilizantes como corrector de suelos. Usos más particulares son los del mármol en escultura y de las calizas litográficas en imprenta.

Las masas terrosas de calcita se emplean como polvo para enlucir y en la industria de gomas y barnices.

La cal expuesta a calentamiento alrededor de 900º C a la presión ordinaria, sufre una descomposición térmica, como sucede también en otros carbonatos a temperaturas distintas, con pérdida del anhídrido carbónico y formación de óxido de calcio, la así llamada cal viva. Esta última tratada con agua y con la debida cautela, puesto que la reacción desarrolla notables cantidades de calor que producen peligrosas quemaduras, se transforma en hidróxido de calcio o cal apagada, utilizada como "ligazón" para la fabricación del mortero. Los romanos llamaban calx a este óxido de calcio obtenido por la calcinación de la caliza.

En muchos pueblos todavía existen a las afueras los conocidos caleros, unos hornos en los cuales se realizaba este proceso con el fin de obtener la cal viva.

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