Azurite nodule
Bildnummer 11717221
| Azurite is a secondary mineral,a hydrated copper carbonate mineral,chemical formula (Cu3(CO3)2(OH)2. It occurs both in crystalline form (monocline) and as an amorphous precipitate. Its name refers to its color,a deep blue azure-blue that makes it popular as a collector's item,but only rarely used in jewelry on account of its susceptibility to wear and color loss. In medieval times,the mineral was ground up and used by painters as a blue pigment. The azurite in this sample has been precipitated in a nodular concretion that has been cut in half,of which both faces have been polished | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Wiersma, Dirk |
| Bildgröße: | 5343 px × 3738 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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