Carnelian pebble. Carnelian is a reddish-brown mineral commonly used as a semi-precious gemstone. It is a variety of chalcedony,a silica (silicon dioxide) mineral,coloured by impurities of iron oxide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 3940 px × 2836 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |