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Ettringite : Ca6Al2[(OH)4|SO4]3 · 26H2O | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa 4.3 x 3.8 x 0.9 cm. Ettringite forms as a precipitate from hydrothermal solutions. It is famous from South Africa - represented here by a plate of mixed little euhedral, gemmy hexagonal crystals with small sugary microcrystals. |
| © Rob Lavinsky | Photo ID: 130249 View Count: 156 |
Inesite : Ca2(Mn,Fe)7Si10O28(OH)2·5H2O | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa Field of view 30 mm. Rui Nunes specimen and photo. |
| © Rui Nunes 2005 | Photo ID: 45626 View Count: 270 |
Limonite : FeO(OH)·nH2O, Pyrite : FeS2 | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa 9.9 x 7.4 x 7.0 cm. One thing you can say about this large specimen from the Kalahari Manganese fields - it is VERY unusual and striking! What you have is a cluster of pyrite crystals atop the gray manganese-rich matrix that have pseudomorphed to limonite - so you are left with these bright rust-colored euhedral crystals piled atop a ... |
| © Rob Lavinsky | Photo ID: 168638 View Count: 80 |
Limonite : FeO(OH)·nH2O | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa Limonite pseudo after Pyrite on top of gray manganese-rich matrix, 9.9 x 7.4 x 7.0 cm |
| © hmessing | Photo ID: 263990 View Count: 9 |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa An uncommon specimen for this locality. Botryoidal growths and not well defined Rhodochrosite crystals with an intense and deep color. Hotazel Mine, Kuruman, Kalahari desert, South Africa. Specimen size: 8.1 × 4.9 × 3.5 cm |
| © fabreminerals.com | Photo ID: 194474 View Count: 68 |
Rhodochrosite : MnCO3 | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa Name: Rhodochrosite (red) Measurements: 12 x 10 cm Collected: Other - in the collection of Crater Rock Museum, Central Point, Oregon (Suomynona Collection) Photographer: Phyllis Richardson Info: Beautiful rhodochrosite crystals, similar in appearance to Peruvian specimens |
| © Crater Rock Museum | Photo ID: 105118 View Count: 246 |
Rhodochrosite : MnCO3 | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa A 10 x 9 cm specimen with disc-shaped crystals of Rhodochrosite from the Hotazel mine, Kalhari manganese-fields, South-Africa. Specimen and photo: Knut Eldjarn. |
| © Knut Eldjarn | Photo ID: 144654 View Count: 130 |
Rhodochrosite : MnCO3 | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa 4.9 x 3.6 x 2.6 cm. The silky surface of this specimen is so reflective that even with just one light source, it looks like those 3D images you see in books, plastic cards, etc. This 2.5 cm ball has a deep color and superb luster. Ex. Charlie Key. |
| © Rob Lavinsky | Photo ID: 180800 View Count: 64 |
Rhodochrosite : MnCO3 | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa An extremely cute piece with rich pink rhodo rhombs almost covering a matrix of white barite! 4 x 4 x 1.8cm |
| © Rob Lavinsky | Photo ID: 20692 View Count: 420 |
Rhodochrosite : MnCO3 | |
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Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa Image is 6 mm wide. |
| © 2006 D. Schläfli | Photo ID: 65816 View Count: 361 |
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