Fluorite crystals. Fluorite or fluorspar (calcium fluoride,CaF2) is a fairly common mineral,extensively mined for use in steelmaking (as a flux) and in other industrial processes. It occurs in cubic crystal groups that can vary in colour from soft green and yellow to colourless and deep purple | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5138 px × 3425 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |