Risorite samples. Close-up of a hand holding samples of the mineral Risorite. 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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5315 px × 3543 px |
Model Release : | Le droit n'est pas encore disponible. Merci de nous contacter avant utilisation. |
Restrictions : | - |