Botryoidal hematite
Numéro d’image : 12539502
| Hematite is a variety of iron oxide (Fe2O3), a mineral mined as one of the main ores of iron. It is also used industrially as a red pigment in paint, and in polishing compounds. This specimen has a bulbous appearance, referred to as botryoidal (grapelike), which in mining practice is referred to as kidney ore. In nature its surface is always coloured a dull yellowish to red-brown; the glossy black surface here seen is thanks to polishing. Specimen is from Taouz in Morocco, actual width 21 cm. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Wiersma, Dirk |
| Taille de l’image : | 5616 px × 3744 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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