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Dolomite, Calcite, Pyrite
Muzo (distrito minero), Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
123x82x39mm (Autor: Fiebre Verde) -
Dolomite, Calcite, Pyrite
Muzo (distrito minero), Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
123x82x39mm (Autor: Fiebre Verde) -
Dolomite, Calcite, Pyrite
Muzo (distrito minero), Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
123x82x39mm (Autor: Fiebre Verde) -
Dolomite, Calcite, Pyrite
Muzo (distrito minero), Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
123x82x39mm (Autor: Fiebre Verde) -
Dolomite, Calcite, Pyrite
Chivor (distrito minero), Municipio Chivor, Cinturón Esmeraldífero Oriental, Departamento Boyacá, Colombia
19 x 11 x 8 cm (Autor: Bergur_E_Sigurdarson) -
Dolomite, Calcite, Pyrite
Chivor (distrito minero), Municipio Chivor, Cinturón Esmeraldífero Oriental, Departamento Boyacá, Colombia
19 x 11 x 8 cm (Autor: Bergur_E_Sigurdarson) -
Dolomite, Calcite, Quartz
Afloramiento en la ruta estatal 1, Woodbury, Condado Cannon, Tennessee, USA
75x79mm (Autor: jordanlowe1089) -
Dolomite, Calcite, Quartz
Mina Monte Cristo, Rush, Distrito Rush Creek, Condado Marion, Arkansas, USA
67mm x 48mm x 37mm (Autor: Don Lum) -
Dolomite, Calcite
Afloramiento en la ruta estatal 1, Woodbury, Condado Cannon, Tennessee, USA
17 x 33 mm. (Autor: jordanlowe1089) -
Dolomite, Calcite
Chivor (distrito minero), Mina Piedra de Chulo, Municipio Chivor, Cinturón Esmeraldífero Oriental, Departamento Boyacá, Colombia
15cm across (Autor: Fiebre Verde) -
Dolomite, Calcite
Distrito minero Ringenwechsel, Troi, Distrito Schwaz, Valle Inn, Tirol Norte, Tirol, Austria
8,5 x 6 cm (Autor: Volkmar Stingl) -
Dolomite, Calcite
Mina Monte Cristo, Rush, Distrito Rush Creek, Condado Marion, Arkansas, USA
84 mm x 55 mm x 45 mm (Autor: Don Lum) -
Dolomite, Calcite
Mina Monte Cristo, Rush, Distrito Rush Creek, Condado Marion, Arkansas, USA
84 mm x 55 mm x 45 mm (Autor: Don Lum) -
Dolomite, Calcite
Mina Monte Cristo, Rush, Distrito Rush Creek, Condado Marion, Arkansas, USA
84 mm x 55 mm x 45 mm (Autor: Don Lum) -
Dolomite, Calcite
Mina Campiano, Montieri, Provincia Grosseto, Toscana, Italia
82 mm x 52 mm x 42 mm (Autor: Firmo Espinar) -
Dolomite, Chalcopyrite, Malachite
Kamsdorf, Unterwellenborn, Distrito Saalfeld-Rudolstadt, Turingia/Thüringen, Alemania
6 x 4 cm (Autor: Volkmar Stingl) -
Dolomite, Chalcopyrite, Malachite
Kamsdorf, Unterwellenborn, Distrito Saalfeld-Rudolstadt, Turingia/Thüringen, Alemania
6 x 4 cm (Autor: Volkmar Stingl) -
Dolomite, Chalcopyrite
Picher Field, Distrito Tri-State, Condado Ottawa, Oklahoma, USA
150 X 90 X 35 (Autor: Robert Seitz) -
Dolomite, Chalcopyrite
Picher Field, Distrito Tri-State, Condado Ottawa, Oklahoma, USA
150 X 90 X 35 mm (Autor: Robert Seitz) -
Dolomite, Chalkopyrite
Depósito Magnesita, Sunk, Niedere Tauern, Estiria/Steiermark, Austria
8 x 5 cm (Autor: Volkmar Stingl) -
Dolomite, Dravite-Schorl Series
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Región Centro, Portugal
11 cm x 7 cm x 3 cm (Autor: silvia) -
Dolomite, Fluorite
Mina Yongping, Yongping, Yanshan, Prefectura Shangrao, Provincia Jiangxi, China
7 x 6,5 cm (Autor: Volkmar Stingl) -
Dolomite, Hematite
Mina Florence, Egremont, West Cumberland Iron Field, (antes Cumberland), Cumbria, Inglaterra / Reino Unido
Specimen size 12 cm, largest dolomite crystals 7 m (Autor: Tobi) -
Dolomite, Hemimorphite, Mimetite
San Antonio Mine (San Antonio el Grande Mine), East Camp, Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico
148.0 x 80.0 x 40.0 mm
Striking specimen of opaque cream-colored rhombs of Dolomite to 2.1 cm nicely perched on limonitic matrix. The Calcite crystals partly engulf glassy Hemimorphite crystals to 1 cm in length. Translucent yellowish Mimetite in spherical crystal aggregates to 3 mm are perched on both Hemimorphite and Calcite crystals. Some Hemimorphite crystals are broken where they emerge from the enclosing Calcite crystals, but they are not distracting. Otherwise, there is no damage. (Author: GneissWare)
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Dolomite, magnesite
Eugui, Navarra, Spain
fov 40 mm (Author: ploum)
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Dolomite, Marcasite
Albvorlandtunnel, Wendlingen, Distrito Esslingen, Región Stuttgart, Baden-Württemberg, Alemania
5 x 5 cm (Autor: Volkmar Stingl) -
Dolomite, Marcasite
Albvorlandtunnel, Wendlingen, Distrito Esslingen, Región Stuttgart, Baden-Württemberg, Alemania
5 x 5 cm (Autor: Volkmar Stingl) -
Dolomite, Muscovite, Pyrite
Alpe Devero, Baceno, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
87 x 47 mm (Autor: Sante Celiberti) -
Dolomite, Muscovite, Pyrite
Alpe Devero, Baceno, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
87 x 47 mm (Autor: Sante Celiberti) -
Dolomite, Pyrite, Calcite, Quartz
Qale-Zari Mine, South Khorasan Province, eastern Iran
FOV is 8.5 cm. (Author: vhairap)
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Dolomite, Pyrite, Calcite, Quartz
Qale-Zari Mine, South Khorasan Province, eastern Iran
FOV is 5 cm. (Author: vhairap)
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Dolomite, Pyrite, Calcite, Quartz
Qale-Zari Mine, South Khorasan Province, eastern Iran
FOV is 8.5 cm. (Author: vhairap)
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Dolomite, Pyrite, Calcite, Quartz
Qale-Zari Mine, South Khorasan Province, eastern Iran
FOV is 12 cm. (Author: vhairap)
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Dolomite, Pyrite, Calcite, Quartz
Qale-Zari Mine, South Khorasan Province, eastern Iran
Size is 19.3 cm in length. (Author: vhairap)
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Dolomite, Pyrite
Eugui, Esteríbar, Comarca Auñamendi, Comunidad Foral de Navarra (Navarra), España
78mm x 34mm x 47mm (Autor: Firmo Espinar) -
Dolomite, Pyrite
Eugui, Esteríbar, Comarca Auñamendi, Comunidad Foral de Navarra (Navarra), España
78mm x 34mm x 47mm (Autor: Firmo Espinar) -
Dolomite, Pyrite
Eugui, Esteríbar, Comarca Auñamendi, Comunidad Foral de Navarra (Navarra), España
78mm x 34mm x 47mm (Autor: Firmo Espinar) -
Dolomite, Quartz
Brumado, Bahia, Región Nordeste, Brasil
5.5 x 3.7 cm (Autor: Don Lum) -
Dolomite, Quartz
Brumado, Bahia, Región Nordeste, Brasil
5.5 x 3.7 cm (Autor: Don Lum) -
Dolomite, Quartz
Mina Stan Trg (Stan Terg, Stari Trg), Complejo Trepča, Valle Trepča, Kosovska Mitrovica, Distrito Kosovska Mitrovica, Kosovo
220 x 155 x 60 mm (Autor: Rob Schnerr) -
Dolomite, Quartz
Mina Campiano, Montieri, Provincia Grosseto, Toscana, Italia
21,5 x 11,5 cm (Autor: Sante Celiberti) -
Dolomite, Quartz
Mina Campiano, Montieri, Provincia Grosseto, Toscana, Italia
21,5 x 11,5 cm (Autor: Sante Celiberti) -
Dolomite, Quartz
Mina Yongping, Yongping, Yanshan, Prefectura Shangrao, Provincia Jiangxi, China
6,5 x 4,5 cm (Autor: Volkmar Stingl) -
Dolomite, Siderite and Quartz
Otanche, Provincia Occidente, Departamento Boyacá, Colombia
72mm x 58mm x 45mm (Autor: Firmo Espinar) -
Dolomite, Siderite and Quartz
Otanche, Provincia Occidente, Departamento Boyacá, Colombia
72mm x 58mm x 45mm (Autor: Firmo Espinar) -
Dolomite, Siderite and Quartz
Otanche, Provincia Occidente, Departamento Boyacá, Colombia
72mm x 58mm x 45mm (Autor: Firmo Espinar) -
Dolomite-Sphalerite
Bou Beker, distrito minero Touissit-Bou Beker, Provincia Jerada, Región Oriental, Marruecos
10 cm x 11 cm (Autor: Enrique Llorens) -
Dolomite. La Florida Mine. Cantabria. Spain. 6 cm (Author: nimfiara)
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Dolomite. Setiles. Guadalajara. Castilla La Mancha. Spain. 11 cm (Author: nimfiara)
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Dolomite
Corydon, Indiana USA (Author: llamabox)
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Dolomite
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=4mm
(Author: Doug)
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Dolomite
Traversella Mine, Traversella, Chiusella Valley, Canavese District, Torino Province, Piedmont, Italy
Dolomite group of 35 mm (Author: Matteo_Chinellato)
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Dolomite
Traversella Mine, Traversella, Chiusella Valley, Canavese District, Torino Province, Piedmont, Italy
Dolomite of 18x14 mm (Author: Matteo_Chinellato)
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Dolomite
Concesión La Cena del Depósito, Huércal-Overa, Comarca Levante Almeriense, Almería, Andalucía, España
FOV 22 mm (Autor: Firmo Espinar) -
Dolomite
Concesión La Cena del Depósito, Huércal-Overa, Comarca Levante Almeriense, Almería, Andalucía, España
FOV 7 mm (Autor: Firmo Espinar) -
Dolomite
Cantera Ben Hogan, Black Rock, Distrito Lawrence County Zinc, Condado Lawrence, Arkansas, USA
9.0 x 9.5 cm (Autor: crosstimber) -
Dolomite
Complejo Trepča, Valle Trepča, Kosovska Mitrovica, Distrito Kosovska Mitrovica, Kosovo
4.0 x 4.7 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
330x250x100mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
330x250x100 (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
330x250x100mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
330x250x100mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
330x250x100m (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
330x250x100m (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
330x250x100mm (Autor: Heimo Hellwig) -
Dolomite
Afloramiento en la ruta estatal 1, Woodbury, Condado Cannon, Tennessee, USA
67x60mm (Autor: jordanlowe1089) -
Dolomite
Depósito Magnesita, Sunk, Niedere Tauern, Estiria/Steiermark, Austria
95 mm (Autor: Gerhard Brandstetter) -
Dolomite
Picher Field, Distrito Tri-State, Condado Ottawa, Oklahoma, USA
125 X 70 X 90 mm (Autor: Robert Seitz) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
5.4 x 8.0 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
130mmx45mmx65mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
130mmx45mmx65mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
130mmx45mmx65mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
130mmx45mmx65mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
130mmx45mmx65mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
35mmx18mm (Autor: Heimo Hellwig) -
Dolomite
Cantera Azcárate (Azkarate), Eugui, Esteríbar, Comarca Auñamendi, Comunidad Foral de Navarra (Navarra), España
142 X 105 mm (Autor: Manuel Mesa) -
Dolomite
Zona Timmins, Distrito Cochrane, Ontario, Canadá
1.8 x 2.3 cm (Autor: crosstimber) -
Dolomite
Cantera Azcárate (Azkarate), Eugui, Esteríbar, Comarca Auñamendi, Comunidad Foral de Navarra (Navarra), España
72 x 47 mm (Autor: Manuel Mesa) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
6.0 x 8.7 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
6.0 x 8.7 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
5.9 x 6.8 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
5.9 x 6.8 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
4.0 x 4.5 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
6.1 x 7.7 cm (Autor: crosstimber) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
6.1 x 7.7 cm (Autor: crosstimber) -
Dolomite
Lago Meredith, Sanford, Texas Panhandle, Texas, USA
15x12x11cm (Autor: Dale Hallmark) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
157mm x 82mm x 32mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
157mm x 82mm x 32mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
157mm x 82mm x 32mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
157mm x 82mm x 32mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
70mm x 52mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
70mm x 52mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
62mm x 64mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
62mm x 64mm (Autor: Heimo Hellwig) -
Dolomite
Cantera Asturreta, Eugui, Esteríbar, Comarca Auñamendi, Comunidad Foral de Navarra (Navarra), España
8 x 8 x 7 cm (Autor: James) -
Dolomite
Mina Bautenberg, Wilden, Wilnsdorf, Distrito Siegen-Wittgenstein, Arnsberg, Renania-Palatinado/Rheinland-Pfalz, Alemania
7 x 4,5 cm (Autor: Andreas Gerstenberg) -
Dolomite
Glücksbrunn, Schweina, Bad Liebenstein, Distrito Wartburgkreis, Turingia/Thüringen, Alemania
7 x 6 cm (Autor: Andreas Gerstenberg) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
74mm x 40mm x 26mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
97mm x 105mm x 18mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
97mm x 105mm x 18mm (Autor: Heimo Hellwig) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
72mm x 58mm x 10mm (Autor: Heimo Hellwig) -
Dolomite
Zona minera Huanggang, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Región Autónoma Mongolia Interior, China
9x9x7 cm (Autor: Joseph DOliveira) -
Dolomite
Bou Beker, distrito minero Touissit-Bou Beker, Provincia Jerada, Región Oriental, Marruecos
8 cm. x 7 cm. (Autor: Enrique Llorens) -
Dolomite
Mina Red Cloud, Distrito Rush Creek, Condado Marion, Arkansas, USA
80 mm x 70 mm x 40 mm (Autor: Don Lum) -
Dolomite
Cantera Walser, Silz, Distrito Imst, Tirol Norte, Tirol, Austria
8 x 6 cm (Autor: Volkmar Stingl) -
Dolomite
Albvorlandtunnel, Wendlingen, Distrito Esslingen, Región Stuttgart, Baden-Württemberg, Alemania
12 x 10 cm (Autor: Volkmar Stingl) -
Dolomite
Albvorlandtunnel, Wendlingen, Distrito Esslingen, Región Stuttgart, Baden-Württemberg, Alemania
12 x 10 cm (Autor: Volkmar Stingl) -
Dolomite
Albvorlandtunnel, Wendlingen, Distrito Esslingen, Región Stuttgart, Baden-Württemberg, Alemania
7,5 x 5 cm (Autor: Volkmar Stingl) -
Dolomite
Cantera El Almendral, Carretera de Berja, Berja, Comarca Poniente Almeriense, Almería, Andalucía, España
105mm x 110mm x 70mm (Autor: Firmo Espinar) -
Dolomite
Albvorlandtunnel, Wendlingen, Distrito Esslingen, Región Stuttgart, Baden-Württemberg, Alemania
5 x 4,5 cm (Autor: Volkmar Stingl) -
Dolomite
Albvorlandtunnel, Wendlingen, Distrito Esslingen, Región Stuttgart, Baden-Württemberg, Alemania
5 x 4,5 cm (Autor: Volkmar Stingl) -
Dolomite
Mina Coleman, Levack, Distrito Sudbury, Ontario, Canadá
2.8x3.2x2 cm''s (Autor: Joseph DOliveira) -
Dolomite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
3.8 x 2.7 cm (Autor: Michael Shaw) -
Dolomite
Distrito minero Ringenwechsel, Troi, Distrito Schwaz, Valle Inn, Tirol Norte, Tirol, Austria
8 x 7 cm (Autor: Volkmar Stingl) -
Dolomite
Distrito minero Ringenwechsel, Troi, Distrito Schwaz, Valle Inn, Tirol Norte, Tirol, Austria
8 x 7 cm (Autor: Volkmar Stingl) -
Dolostone and silica. (Author: vic rzonca)
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Don’t laugh - it took hours panning in a stream to get this speck of Gold -got eaten alive by Bulgarian Mozzies....... (Author: Colleen Thomson)
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Donnayite-(Y)
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=4mm (Author: Doug)
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Donnayite-(Y)
Galería de base túnel Semmering, Gloggnitz, Distrito Neunkirchen, Baja Austria/Niederösterreich, Austria
FoV ca. 1 x 1,5 cm (Autor: Volkmar Stingl) -
Double geode of azurite/malachite (3.2 x 1.7 x 0.5 cm) from Inyo Co., California, USA, purchased from Rob Lavinsky (Author: Linda St-Cyr)
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Double terminated,measures about 17 x 12 mm (Author: nurbo)
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Double terminated, naturally etched morganite crystal, from Oceanview mine (Oceanview adit), Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Size 42 x 35 x 25 mm (Author: olelukoe)
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Double-generation calcite, San Antonio El Grande, Chihuahua Mexico. Size: 7cm. (Author: javmex2)
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Doyleite, Gibbsite
Prefectura Baoshan, Provincia Yunnan, China
95 x 60 x 25 mm (Autor: Rob Schnerr) -
Doyleite-Gibbsite Baoshan.jpg (Author: Jordi Fabre)
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Dravite
Hüttermühle, Radeberg, Dresden, Saxony, Germany.
8 x 2,5 cm (Author: Andreas Gerstenberg)
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Dravite
Soklich Open Cut, Yinnietharra Station, Pilbara Region, Western Australia, Australia
66 mm x 53 mm x 52 mm (Author: Carles Millan)
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Dravite
Soklich Open Cut, Yinnietharra Station, Pilbara Region, Western Australia, Australia
66 mm x 53 mm x 52 mm (Author: Carles Millan)
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Dravite
Soklich Open Cut, Yinnietharra Station, Pilbara Region, Western Australia, Australia
66 mm x 53 mm x 52 mm (Author: Carles Millan)
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Dravite
Soklich Open Cut, Yinnietharra Station, Pilbara Region, Western Australia, Australia
66 mm x 53 mm x 52 mm (Author: Carles Millan)
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Dravite (Tourmaline Group)
Landanai, Región Arusha, Tanzania
35 mm x 29 mm x 20 mm (Autor: Don Lum) -
Dravite (Tourmaline Group)
Paso Plateau Rosa, Breuil-Cervinia, Valtournenche, Valle de Aosta (Val d'Aosta), Italia
78,4 x 72,8 mm (Autor: Sante Celiberti) -
Dravite (Tourmaline Group)
Canteras Beura, Beura-Cardezza, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
132 x 98 mm (Autor: Sante Celiberti) -
Dravite (Tourmaline Group)
Canteras Beura, Beura-Cardezza, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
80 x 77 mm (Autor: Sante Celiberti) -
Dravite (Tourmaline Group)
Minas Gerais, Brasil
22mm x 34mm x 20mm (Autor: Firmo Espinar) -
Dravite-Schorl Series
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Región Centro, Portugal
(Autor: am mizunaka) -
Dravite
Distrito Jajarkot, Karnali Pradesh, Nepal
3.3 x 2.8 cm (Autor: steven calamuci) -
Dravite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 4mm (Autor: Doug) -
Dravite
May Downs Station, Mount Isa, City of Mount Isa, Queensland, Australia
10.0 x 6.7 cm (Autor: am mizunaka) -
Dravite
Canteras Beura, Beura-Cardezza, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
5 x 3,5 cm (Autor: Volkmar Stingl) -
Dravite
Canteras Beura, Beura-Cardezza, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
5 x 3,5 cm (Autor: Volkmar Stingl) -
Eugui, Esteríbar, Comarca Auñamendi, Comunidad Foral de Navarra (Navarra), España
15 cm x 8 cm x 5 cm (Autor: James Catmur) -
Drawings of an interpretation of the Alme calcite habit. Top, standard crystallographic orientation. Bottom, view corresponding to Tobias’ photos. (Author: Pete Richards)
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dreislar.jpg (Author: Tobi)
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Drill workings in an area where blasting will be done in a few days. David Soler photo, September 2005. (Author: Joan Rosell)
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Drillers, San José La Rica mine, Real del Monte, Hidalgo, México (1983)
Fotografía: David Maawad, publicada en "Una visión de la Minería" núm 86 (Author: Luis Domínguez)
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Drillers. San Juan Pachuca Mine, Pachuca, Hidalgo, Mexico (1988)
Author: Marco Antonio Hernández Badillo from the book "Entre la tierra y el aire". Edition: Archivo Histórico y Museo de Minería, A.C.
www.distritominero.com (Author: Jordi Fabre)
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DRILLING UNDERGROUND
In underground mines like Milpillas, specialized long-hole drill equipment was paramount for preparing rock for blasting. These powerful drills created deep, precise boreholes into which explosives were loaded. This allowed for controlled detonation, breaking up the ore body into manageable sizes for extraction, a crucial step in the mine’s production cycle.
On a daily basis, miners navigated a subterranean world where the primary target was high-grade Chalcocite, a crucial Copper sulfide ore found within the mine’s extensive enriched blankets. However, earlier operations, before the sulphide zone was reached, brought them face-to-face with a stunning array of secondary Copper minerals, particularly prevalent in the shallower, oxidized zones of the deposit. These encounters routinely included the visually striking blue Azurite and its verdant counterpart, Malachite, which often display intricate intergrowths or even pseudomorphic transformations. Furthermore, the miners commonly observed the lustrous red Cuprite and deposits of glimmering native Copper. While less frequent, other notable green Copper minerals such as Brochantite and the distinctive blue-green Chrysocolla might also be present, alongside occasional rare silicates, painting a vivid picture of the mine’s diverse mineral composition. The mine was well-known for producing exceptionally well-crystallized Volborthite, a rare Copper poly-vanadate, sometimes found on a matrix of Dickite or associated with Azurite and Malachite.
The photographs also highlight the relative scarcity of significant ‘collector-quality’ mineralized pockets conducive to specimen collecting. The Milpillas Mine, despite its economic prowess as a Copper producer, wasn’t uniformly “mineralogically rich” in the way some mineral collectors often dream. While extensive zones yielded abundant Copper ore, the frequent discovery of collector-quality Azurite and Malachite vugs, brimming with “splendent” crystals, was not an everyday occurrence. Like many commercial mining operations, Milpillas had its hot spots; certain areas provided significant quantities of high-grade Copper ore for the electrolytic plant, while others, some distinct from the primary ore body, provided treasure troves for exceptional mineral specimens. This dichotomy is a common reality in the world of mineral collecting, where the pursuit of stunning crystals often means sifting through vast amounts of economically viable yet aesthetically uninteresting ore.
When routine mining operations intersected mineralized veins and vugs, some large, containing exceptional Azurite and Malachite crystals, these occurrences were opportunistically exploited by ‘some workers’ as a means of illicit income supplementation. Penoles, the owners and operators of the mine, actively discouraged such unauthorized extraction, enforcing a strict policy of dismissal and potential criminal prosecution for apprehended individuals. Furthermore, any worker implicated in such illicit activities faced industry-wide blacklisting, effectively precluding future employment within the mining sector.
Initially, the value of these surreptitiously acquired specimens was nominal, commanding only a few pesos. However, the Internet facilitated a rapid increase in market awareness among the miners, who quickly discerned the substantial value placed on these “colored rocks” by International, particularly North American, dealers and collectors.
A NOTE ON “THIS-OR-THAT POCKET” NOMENCLATURE
The use of the term “pocket” to describe certain Milpillas mineral specimens, particularly in reference to their extraction point, transcends simple geographical identification. These labels, rather than being intrinsic descriptors understood by those who extracted the specimens, were often marketing tools designed to imbue the minerals with a specific allure. Those intimately familiar with the mine’s day-to-day operations understood that such terms were colloquialisms, not reflections of actual geological structures or mining methodology.
While official company documents certainly highlighted and celebrated areas with significant mineralization — often featuring stunning, perfectly formed crystals of Azurite, Malachite, and other Copper minerals — they deliberately avoided calling these spots “pockets.” Instead, they used more formal geological terms. Their descriptions focused on the geological structures controlling the mineralization, the types of rocks surrounding the minerals, and their exact mineral makeup. This intentional choice of language pointed to a clear difference between the casual, on-the-ground language used by some of the mine workers who opportunistically and illegally exploited the mineralized zones for personal profit and the precise, scientific terminology preferred in corporate and geological reports. It was likely an effort to keep all official communications consistent and scientifically accurate, ensuring a formal narrative throughout.
Original photos courtesy of Gonzáléz Sánchez (Author: silvia)
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Drusy Calcite with Marcasite,
from Rayas mine, Guanajuato, Gto.
88 x 70 x 25 mm (Author: Carlos M.)
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Drusy pale Amethyst xls on Epidote carpet
Cerro De La Concordia, Piedra Parada, Mun. de Tatatila, Veracruz, Mexico
90x55x72mm
One of my favorites (Author: Carlos M.)
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Druzy quartz, the other part of the pocket. (Author: vic rzonca)
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DSC01321.jpg (Author: Anton Potgieter)
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DSC01326.JPG (Author: Anton Potgieter)
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DSC01329.jpg (Author: Anton Potgieter)
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DSC01389.jpg (Author: Anton Potgieter)
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DSC01399.jpg (Author: Anton Potgieter)
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DSC01407.jpg (Author: Anton Potgieter)
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DSC03241.jpg (Author: Anton Potgieter)
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DSC03249.jpg (Author: Anton Potgieter)
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DSC03274.jpg (Author: Anton Potgieter)
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DSCF1036.jpg (Author: vic rzonca)
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DSCF1038 (1).jpg (Author: vic rzonca)
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DSCF1699.jpg (Author: vic rzonca)
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DSCF1761.jpg (Author: vic rzonca)
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DSCF1766.jpg (Author: vic rzonca)
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DSCF1770 (1).jpg (Author: vic rzonca)
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DSCF1911.JPG (Author: Bob Harman)
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DSCF4403.JPG (Author: nurbo)
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DSC_0074.JPG (Author: Gail)
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DSC_0133.jpg (Author: Tomasz Praszkier)
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DSC_0149.jpg (Author: Gail)
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DSC_0150.jpg (Author: Gail)
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DSC_0499.jpg (Author: Gail)
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DT quartz crystal with attached quartz points, Honghe, yunnan Province, China. 10.5 x 5 x 5 cm (Author: Tracy)
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DT Rutile Mogok Burms 6mm tall (Author: nurbo)
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Dufrenoysite, Realgar
Cantera Lengenbach, Fäld, Valle Binn (Binntal), Wallis (Valais), Suiza
6 x 4 mm (Autor: Volkmar Stingl) -
Dufrenoysite
Cantera Lengenbach, Fäld, Valle Binn (Binntal), Wallis (Valais), Suiza
4 x 2.5 cm (Autor: Volkmar Stingl) -
Duftite
Tsumeb Mine, Tsumeb, Otjikoto, Namibia
fov 1.4 mm (Author: Rewitzer Christian)
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Duftite (Author: Gail)
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Duftite -Benahadux, Almería, Spain (Author: Rewitzer Christian)
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Duftite -Benahadux, Almería, Spain (Author: Rewitzer Christian)
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