A polished slice of agate (a variety of chalcedony) with concentric banding which is artificially coloured. From Uruguay. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / NATURAL HISTORY MUSEUM,LONDON |
Taille de l’image : | 5616 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |