Cut agate
Numéro d’image : 11751742
| Agate. Slice of the mineral agate,a form of quartz (silicon dioxide),consisting of banded chalcedony. The colours are produced by impurities in the mineral,which formed as successive layers of quartz precipitate out of solution. Agate is prized by collectors as a gem and also traditionally used to make a pestle and mortar | |
| Licence : | Libre de droits |
| Crédit: | Science Photo Library / Lawry, Lawrence |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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