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. The specimen shown here has a bulbous appearance, also 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 18 cm. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5435 px × 3744 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |