Lapis lazuli crystals I
Numéro d’image : 12248945
| Lapis lazuli is a rock composed of the feldspathoid mineral lazurite, reknown for its strikingly blue color. Frequent secondary components are calcite, sodalite and pyrite. It is formed by contact metamorphism in marbles and limestones, near igneous intrusions. Well developed crystals as here seen are rare. Marble is the most common host-rock as also in this specimen. Lapis lazuli is a semi-precious stone widely used in jewelry, and has been highly prized since antiquity. The richest occurrences worldwide are in the Badakhshan province of Afghanistan, where lapis has been mined for 6, 500 years; jewelry containing it has been found at ancient Egyptian sites. Actual height is 130 mm. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Wiersma, Dirk |
| Taille de l’image : | 3597 px × 5126 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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