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Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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Mawi pegmatite, Laghman (Lagman; Nuristan) Province, Afghanistan A single Columbite crystal. 5.2 x 3.5 x 2.0 cms. Photo and collection of Lee Johnson. |
| © Lee Johnson | Photo ID: 252843 View Count: 6 |
Columbite : (Fe,Mn)(Nb,Ta)2O6, Microcline : K[AlSi3O8], Albite : Na[AlSi3O8] | |
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Giles Columbite-Beryl Pegmatite (Giles Prospect), Spargoville, Coolgardie Shire, Western Australia, Australia Specimen Length = 12cm (4 inches) |
| © Ben Nicolson | Photo ID: 11984 View Count: 1181 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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Minas Gerais, Southeast Region, Brazil Tabular crystal of black to metallic columbite. The crystal shows several modified faces in the corners. Minor pocket clay attached to the crystal edges. Ex. A. Stevenson collection #102. Overall size of mineral specimen: 16x15x5 mm. Size of individual crystals: 15 mm. |
| © 2001 John H. Betts | Photo ID: 1130 View Count: 1229 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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Galiléia, Doce valley, Minas Gerais, Southeast Region, Brazil WOW! This is an unusual pseudocubic crystal of columbite with edges to 3.3 cm long. The crystal is deep black in color, with a nice luster but with slight pitting on the faces. One side of the crystal is contacted. Very large example of the classic Brazilian coloumbites. A couple of collection labels come with piece. 3.4 x 3.3 x 3.1 cm |
| © Rob Lavinsky | Photo ID: 69387 View Count: 276 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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Boa Vista pegmatite, Laranjeiras, Galiléia, Doce valley, Minas Gerais, Southeast Region, Brazil Parallel crystals with 4x3,5x2cm - January of 2007 |
| © Martins da Pedra | Photo ID: 85812 View Count: 175 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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Governador Valadares, Doce valley, Minas Gerais, Southeast Region, Brazil Huge (11cm) Columbite crystal. Rob Lavinsky, Munich Show 2007 |
| © J.Ralph | Photo ID: 132684 View Count: 499 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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Governador Valadares, Doce valley, Minas Gerais, Southeast Region, Brazil 6 x 4,5 cm |
| © Bráulio | Photo ID: 67306 View Count: 254 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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São José da Safira, Doce valley, Minas Gerais, Southeast Region, Brazil Columbite. Vasco Trancoso collection and photo. Size: 6 X 5 X 4,5cm. Huge and well defined prismatic crystal. |
| © vasco trancoso | Photo ID: 188278 View Count: 89 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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São José da Safira, Doce valley, Minas Gerais, Southeast Region, Brazil 9.5 x 7.3 x 4.1 cm |
| © Dan & Diana Weinrich Minerals | Photo ID: 229015 View Count: 31 |
Columbite : (Fe,Mn)(Nb,Ta)2O6 | |
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Araçuaí, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil Columbite, 3.4 cm., a fairly large, sharp & lustrous crystal. Ex-Marty Zinn Collection. Kelly Nash specimen & photo. |
| Photo ID: 172742 View Count: 116 | |
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