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Andradite : Ca3Fe3+2[SiO4]3 | |
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Mica Lode mine (Mica Hill Mine), Eight Mile Park pegmatite District, Fremont Co., Colorado, USA Cluster of red-brown andradite garnet with minor matrix attached. No reference of andradite can be found in researching this locality - could be a new occurrence. Overall size of mineral specimen: 3x2x1.5 cm. Size of individual crystals: 5x15 mm. |
| © 2002 John H. Betts | Photo ID: 5983 View Count: 397 |
Andradite : Ca3Fe3+2[SiO4]3 | |
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Mica Lode mine (Mica Hill Mine), Eight Mile Park pegmatite District, Fremont Co., Colorado, USA Cluster of red-brown andradite garnet with minor matrix attached. No reference of andradite can be found in researching this locality - could be a new occurrence. Overall size of mineral specimen: 2x2x2 cm. Size of individual crystals: 5x15 mm. |
| © 2002 John H. Betts | Photo ID: 5984 View Count: 379 |
Apatite | |
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Chief lithium pegmatite, Texas Creek Area, Fremont Co., Colorado, USA Grayish-blue crystalline sample; 5x2.5x2.5cm; Rather rare from here. Collected by Rudy Bolona, Oct. 2008. |
| Photo ID: 190073 View Count: 68 | |
Beryl : Be3Al2Si6O18 | |
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Devils Hole Mine (Wild Rose Mine), Devils Hole Area, Fremont Co., Colorado, USA This locality produced large beryl crystals. the main economic mineral mined here during World War II. Around 300 tons of beryl were found. These two specimens are about 15 meters high on the pegmatite wall and around 50 cm wide. Photo; Rudy Bolona, October 4, 2008. |
| Photo ID: 188249 View Count: 102 | |
Beryl : Be3Al2Si6O18 | |
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Devils Hole Mine (Wild Rose Mine), Devils Hole Area, Fremont Co., Colorado, USA Cast of large beryl in pegmatite. the cast is 75 cm long and 30 cm wide. Photo; Rudy Bolona, October 4, 2008. |
| Photo ID: 188250 View Count: 72 | |
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Mica Lode mine (Mica Hill Mine), Eight Mile Park pegmatite District, Fremont Co., Colorado, USA Radial tabular crystal with yellowish parsonsite on surface; 12x4.6x1.4cm; Quite radioactive for a Columbite. Collected by Bob Sloan in the 1990s. Collection of Rudy Bolona. |
| Photo ID: 160579 View Count: 84 | |
Columbite-(Fe) : FeNb2O6 | |
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Devils Hole Mine (Wild Rose Mine), Devils Hole Area, Fremont Co., Colorado, USA Nice mostly complete crystal; 3x2.3x1.4cm; Collection of Rudy Bolona. |
| Photo ID: 150437 View Count: 85 | |
Columbite-(Fe) : FeNb2O6 | |
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Devils Hole Mine (Wild Rose Mine), Devils Hole Area, Fremont Co., Colorado, USA I worked an albite zone, removing some muscovite and this appeared! A nice grouping of columbite crystals. The main crystal is 11 x 4.6 x 2 cm and weighs 252 grams. Most columbites here are less than 2cm. These are quite large for the locality. These are in my collection now. Photo; Rudy Bolona. |
| Photo ID: 188248 View Count: 66 | |
Columbite-(Fe) : FeNb2O6 | |
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Devils Hole Mine (Wild Rose Mine), Devils Hole Area, Fremont Co., Colorado, USA Terminated crystal; 7.8x2.8x1.5cm; I removed this crystal from albite replacement zone. Collected by Rudy Bolona. |
| Photo ID: 188638 View Count: 41 | |
Elbaite : [Na][(Li,Al)3][Al6][(OH)3|OH|(BO3)3|Si6O18], Spessartine : Mn2+3Al2[SiO4]3, Albite (Var: Cleavelandite) : Na[AlSi3O8], Quartz : SiO2 | |
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Chief lithium pegmatite, Texas Creek Area, Fremont Co., Colorado, USA Green elbaite with red spessartine surrounded by a halo of blue tourmaline, on clevelandite and quartz matrix; 8x6.5x3cm; Colored tourmalines are quite rare in Colorado. These make nice association pieces Collected by Rudy Bolona, Oct. 2008. |
| Photo ID: 190072 View Count: 76 | |
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