Botryoidal malachite
Bildnummer 13435499
| Malachite is a hydrated copper carbonate mineral with chemical formula Cu2CO3(OH)2. It crystallizes in the monoclinic crystal system, and usually occurs in amorphous (non-crystalline) form. Malachite is often formed by precipitation from hydrothermal fluids in open spaces (voids) of rocks containing, or associated with, copper ores. Such precipitation takes place layer by layer, much like stalactites, forming rounded bulbs that eventually lead to a botryoidal (grape-like) or kidney-shaped surface. Malachite is famous for its vivid green colour and is extensively worked into trinkets and small ornaments. This specimen is from the Congolese copper-mining province of Shaba, overall height is 180 millimetres. | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Wiersma, Dirk |
| Bildgröße: | 2508 px × 3740 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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