Psilomelane. Botryoidal form of the mineral psilomelane,an ore of manganese. Psilomelane composed mostly of the mineral romanechite,a barium manganese oxide mix. Here,botryoidal refers to the grape-like shapes,which formed due to underground hydrothermal (hot water) processes. Manganese is a valuable metal since it is an essential ingredient in steel and other alloys. The height of this sample is 11 centimetres | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 3756 px × 5500 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |