Azurite
Bildnummer 11727255
| Azurite is a secondary mineral,a hydrated copper carbonate,crystal symmetry monoclinic,chemical formula (Cu3(CO3)2(OH)2. It occurs both in crystalline form but more frequently as an amorphous precipitate. Its name refers to its color,a deep azure-blue that makes it popular as a collector's item,but only rarely used in body-jewelry on account of its susceptibility to wear and color loss. In medieval times,the mineral was ground into fine powder and used by painters as a blue pigment. The azurite in this sample is a sub-crystalline precipitate on a rock substrate that shows a thin coating of a green mineral,most probably malachite. Actual width is 140 mm | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Wiersma, Dirk |
| Bildgröße: | 5061 px × 3651 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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