Goethite mineral. Goethite is a hydrous iron oxide mineral (Fe.O.OH),formed in soils or other low-temperature environments. Since prehistoric times,goethite has been used as a pigment and as an iron ore (source of iron). Here,it is in the form of globular aggregates,but is also seen in other forms,such as pinnacles or stalactites. Its crystal system is orthorhombic. This specimen,22 centimetres across,is from Lake Superior,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5138 px × 3425 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |