Malachite

Numéro d’image : 13242931
Malachite
The mineral malachite is a hydrated copper carbonate 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 all kind of small ornaments. This specimen is from the Congolese copper-mining province Shaba, overall width is 40 cm.
Licence : Droits gérés
Crédit: Science Photo Library / Wiersma, Dirk
Taille de l’image : 5300 px × 3744 px
Model Release : Non requis
Property Release : Non requis
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