Banded texture in agate. Close-up of the cut and polished surface of agate,a type of chalcedony,a cryptocrystalline variety of quartz. The bands form due to the precipitation of different mineral salts from a solution inside a hollow rock,or geode. For instance,the red bands are formed of iron oxide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 4924 px × 3582 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |