Chrysocolla encrustations (blue) on a rock. Chrysocolla (hydrous copper silicate) is a semi-precious mineral found in stalactic masses (stalactites). In its pure form chrysocolla is soft and fragile and is more often used when found fused with other gemstones,such as agate. Chrysocolla is formed in the oxidation zones of copper-rich ore deposits and is an important surface indicator pinpointing the presence of copper. This specimen,from Morenci,Arizona,USA,measures 160 millimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5616 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |