Fluorspar crystals. Fluorspar or fluorite (calcium fluoride,CaF2) is a mineral that is mined for use as a flux in making steel,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. This specimen,which includes green and blue crystals,is from the Rogerley Mine,in the Weardale district of County Durham,UK. This image shows an area around 80 millimetres across | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Bond, Martin |
Taille de l’image : | 4718 px × 3791 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |