Chalcocite crystals. Chalcocite,copper (i) sulphide,is an important copper ore mineral. This sample is from Connecticut,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / PETR JAN JURACKA |
Taille de l’image : | 5166 px × 3449 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |