Jasper,cut and polished surface. Jasper is a form of chalcedony,a type of cryptocrystalline quartz (silica,SiO2) mineral. The dramatic colours are derived from impurities in the rock,mostly iron oxide. This sample is from Roy Hill in Western Australia | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 3701 px × 4767 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |