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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil Superb lustrous reddish-brown prismatic terminated crystals of dravite to 1.5 cm in length are covering matrix. Size: 4.7 x 4.1 x 2.6 cm. |
| © Dan Weinrich Minerals | Photo ID: 227105 View Count: 35 |
Hematite : Fe2O3 | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil 4 cm crystal. S411-101 Photographer's specimen, deacquisitioned. |
| © 2009, JGW | Photo ID: 250489 View Count: 29 |
Magnesite : MgCO3, Uvite : [Ca][(Mg,Fe2+)3][MgAl5][(OH)3|F|(BO3)3|Si6O18], Goethite : α-Fe3+O(OH) | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil Colorless magnesite crystals with brown uvite crystals and minor goethite. sample size 10 x 6,5 cm. |
| © Bráulio | Photo ID: 47850 View Count: 312 |
Magnesite : MgCO3, Goethite : α-Fe3+O(OH) | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil Magnesite crystal group partially covered by Goethite micro spheres. Size 4x3x2cm. Rafael Hernandes Corrêa-Silva Collection |
| © Brhounds | Photo ID: 58152 View Count: 273 |
Magnesite : MgCO3 | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil Transparent crystals of magnesite, the main one measuring 3 cm in size. Specimen size: 6.1 x 2.8 x 5.4 cm. |
| © Javier Taguas | Photo ID: 57752 View Count: 257 |
Magnesite : MgCO3 | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil Choice glassy transparent colorless rhombohedral crystals of magnesite to 5.8 cm across are forming a matrix-less twinned cluster. Size: 5.8 x 3.5 x 3.2 cm. |
| © Dan Weinrich Minerals | Photo ID: 226780 View Count: 51 |
Nováčekite-I : Mg(UO2)2(AsO4)2·12H2O | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil 2.1 x 2.0 x 0.4 cm. Novacekite is an uncommon magnesium uranyl arsenate. This fine thumbnail consists of lustrous, layered plates of pastel-yellow novacekite and is from the Pedra Preta Mine, near Brumado, Brazil. The world’s finest novacekites come from this area. Old material. Ex. Carl Davis Collection. |
| © Rob Lavinsky | Photo ID: 222339 View Count: 75 |
Quartz : SiO2 | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil 9 cm |
| © Bráulio | Photo ID: 48501 View Count: 302 |
Rutile : TiO2 | |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil Superb 2.9 x 1.7 cm grouping of lustrous and sharp crystals of rutile. The longest crystal in this group is 2.3 cm in length. |
| © 1995-2001 Trinity Mineral Co. | Photo ID: 1470 View Count: 704 |
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Pedra Preta pit, Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil 5 mm perfect and well shaped rutile crystal beside green gemmy uvite tourmaline and minor goethite globules in a massive magnesite aggregate. |
| © Bráulio | Photo ID: 67308 View Count: 249 |
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