Tiger's eye and hawk's eye gemstones. These gemstones are formed when the mineral crocidolite (blue asbestos) is replaced by quartz. Hawk's eye (bottom) retains the original blue colour while tiger's eye (top) contains a residue of iron oxide,forming a golden to red-brown colour | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Natural History Museum, London |
Taille de l’image : | 2646 px × 3302 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |