Risorite samples. This is a titanium-bearing variety of the mineral fergusonite,which is an oxide of yttrium and niobium,but can contain several additional rare earth elements as well. It is a lustrous black to brown,or greyish black,and usually has an amorphous appearance. These samples are from Gjerstad,Norway,and measure 50 mm wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 5315 px × 3543 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |