Cubic fluorite crystals. Also known as fluorspar or Blue John,this mineral is composed of calcium fluoride. It is used extensively as a flux material in the smelting of iron and also in the ceramic and chemical industries. This deep purple variety is also known as blue John. This sample is from Mexico | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Clutson, Michael |
Taille de l’image : | 5400 px × 3600 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |