Haematite. This is kidney ore,the botryoidal (grape-like) form of this mineral ore (iron oxide,formula: Fe2O3) that is mined as the principal source of the metallic element iron. The sample has been polished to remove the red iron oxide (rust) that forms upon exposure to air. Forms of haematite can vary in colour from black-grey to red. It is a common mineral,used in paint making (as a red pigment) and in polishing compounds | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Biophoto Associates |
Taille de l’image : | 5134 px × 3472 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |