Bournonite (copper lead antimony sulphide),or 'cog-wheel ore'. Cog wheel ore contains the mineral chromite,although it is difficult to extract from crystals. Natural History Museum,London,UK | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Natural History Museum, London |
Taille de l’image : | 2949 px × 2962 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |