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Quartz : SiO2 | |
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Prieska District, Namaqualand, Northern Cape Province, South Africa Tiger Iron - 12x12 cm - here in South Africa it is known as "Muggle stone" was found on the farm of the "Mugglestein's" Priska district. |
| Photo ID: 168188 View Count: 113 | |
Riebeckite : [ ][Na2][Fe2+3Fe3+2][(OH)2|Si8O22] | |
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Prieska District, Namaqualand, Northern Cape Province, South Africa Size: 9 X 3 cm Collection and photo: M Arliguie |
| © M Arliguie | Photo ID: 88376 View Count: 197 |
Riebeckite (Var: Crocidolite) : [ ][Na2][Fe2+3Fe3+2][(OH)2|Si8O22] | |
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Prieska District, Namaqualand, Northern Cape Province, South Africa 7.6 x 3.9 x 2.8 cm. Crocidolite is a form of riebeckite [Na2][Fe2+3Fe3+][(OH)2|Si8O22], which is easily apparent when you see the specimens densely-packed hair-like fibers. This variety is often called "blue asbestos" due to its deep blue-black color. This is an old-time piece from mining in South Africa. Fortunately, it was not used much ... |
| © Rob Lavinsky | Photo ID: 210685 View Count: 84 |
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Prieska District, Namaqualand, Northern Cape Province, South Africa A rich mat of gray-blue Crocidolite fibers. FOV is 3 cm. Photo and collection of Lee Johnson. |
| © Lee Johnson | Photo ID: 239210 View Count: 22 |
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