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Alleghanyite : Mn2+5[(OH)2|(SiO4)2] | |
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Sunnyside Mine (American Tunnel; Mogul Mine; Washington Mine; Belle Creole; Gold Prince; Brenneman Mine; Sunnyside Mine Group), Howardsville, Silverton District, San Juan Co., Colorado, USA These crystals, despite their size, are some of the finest color, exceptionally well crystallized Alleghanyites you''ll see from any locality. Typically Alleghanyite forms in pinkish-grey or pinkish-brown color crystals, if they''re even crystallized at all (most Alleghanyite I''ve seen is anhedral and good crystals are few and far between in this ... |
| © Rob Lavinsky | Photo ID: 70403 View Count: 354 |
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Osceola Mine, Cunningham Gulch, Silverton, Silverton District, San Juan Co., Colorado, USA 5.0 x 3.1 x 1.7 cm. A seldom seen Calcite from the Osceola mine near Silverton. This specimen is filled with sharp, chocolate brown Calcite scalenohedra bursting in every direction. The crystals have a matte luster and are apparently coated as the underside of the piece shows white/colorless Calcite crystals. Ex. Jaime Bird Collection. |
| © Rob Lavinsky | Photo ID: 221299 View Count: 56 |
Calcite (Var: Manganoan Calcite) : (Ca,Mn)CO3 | |
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American Tunnel mine (Gold King Mine), Howardsville, Silverton District, San Juan Co., Colorado, USA A gemmy amber rhombehedron is coated by a second generation of mangano calcite, looking like marzapan! 8cm X 4cm X 5cm |
| © Geoffrey Krasnov | Photo ID: 87685 View Count: 159 |
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Yukon Mine, Howardsville, Silverton District, San Juan Co., Colorado, USA 13.4 x 12.2 x 5.8 cm. A classic and rarely seen Manganoan Calcite specimen from the Yukon mine in the famous Silverton Mining District. The piece is filled with tiny, sparkling, pale pink crystalline Manganoan Calcite. When the piece is backlit, it shows a gorgeous pink hue, and the reverse side of the piece shows the typical "San Juan Quartz" ... |
| © Rob Lavinsky | Photo ID: 258678 View Count: 6 |
Chalcopyrite : CuFeS2, Quartz : SiO2 | |
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Bandora Mine (Esmeralda Claims; Little Todd vein), South Mineral Creek, Silverton, Silverton District, San Juan Co., Colorado, USA 9.0 x 5.2 x 4.1 cm. Highly lustrous, very lightly iridescent, brassy, twinned and untwinned chalcopyrite crystals are aesthetically scattered in a "forest" of translucent, milky quartz crystals from the Bandora Silver Mine of San Juan County. Ex. Dave Stoudt Collection. |
| © Rob Lavinsky | Photo ID: 199583 View Count: 54 |
Chalcopyrite : CuFeS2, Quartz : SiO2 | |
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Bandora Mine (Esmeralda Claims; Little Todd vein), South Mineral Creek, Silverton, Silverton District, San Juan Co., Colorado, USA Brassy semi-lustrous sharp crystals of chalcopyrite to 1.1 cm in size are scattered attractively over a 7.6 x 4.1 x 4.1 cm matrix coated by crystallized colorless quartz. There are many good chalcopyrite crystals present. Tiny chipping is present on some edges throughout the piece; to my naked eye though this is in very good condition ... |
| © Diana & Dan Weinrich Minerals | Photo ID: 233588 View Count: 23 |
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Bandora Mine (Esmeralda Claims; Little Todd vein), South Mineral Creek, Silverton, Silverton District, San Juan Co., Colorado, USA large somewhat iridescent crystals of chalcopyrite to 3.4 cm in size covering a massive chalcopyrite matrix. Size: 4.2 x 3.7 x 2.9 cm. |
| © Dan Weinrich, Inc. | Photo ID: 223521 View Count: 17 |
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Silverton, Silverton District, San Juan Co., Colorado, USA Ferberite – close-up of numerous clusters and aggregates of black crystals on an approx 6 x 5 cm matrix. Comes with label stating the location as Silverton, Colorado. |
| © Christopher O'Neill | Photo ID: 156701 View Count: 119 |
Fluorite : CaF2 | |
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Sunnyside Mine (American Tunnel; Mogul Mine; Washington Mine; Belle Creole; Gold Prince; Brenneman Mine; Sunnyside Mine Group), Howardsville, Silverton District, San Juan Co., Colorado, USA A striking plate of flattened translucent green fluorite cubes with preferentially frosted faces from the famous Sunnyside Mine of Colorado. This is old material and almost impoosible to obtain on the market nowadays, especially in crystals of this size. Interior cleavage gives the beautiful color effects. Purple fluorescence. Ex Collectors Edge ... |
| © Rob Lavinsky | Photo ID: 20510 View Count: 289 |
Fluorite : CaF2, Quartz : SiO2, Rhodochrosite : MnCO3 | |
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Sunnyside Mine (American Tunnel; Mogul Mine; Washington Mine; Belle Creole; Gold Prince; Brenneman Mine; Sunnyside Mine Group), Howardsville, Silverton District, San Juan Co., Colorado, USA Octehedrons to 1.4cm on edge with quartz and beige rhodochrosite. Photographed by, and in the collection of, Karl Volkman |
| © Karl Volkman04/05 | Photo ID: 30603 View Count: 259 |
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