Haematite,close-up. This common mineral is a variety of iron oxide (Fe2O3),mined as one of the main ores of iron. The specimen shown here has a bulbous appearance,also referred to as botryoidal (grapelike),which in mining practice is referred to as kidney ore. Here it is a dull red,known as red ochre,although haematite's colour can vary from black to red to steel grey. As well as being mined for iron,it is used industrially as a red pigment in paint,and in polishing compounds. Actual width: 18 centimetres | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5507 px × 3712 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |