Allanite in its host rock. Allanite,also known as orthite,is a sorosilicate mineral. It is one of the most ubiquitous rare earth minerals known and an important ore for a number of rare earth elements,like cerium,lanthanum,yttrium and thorium. It is usually black with a high lustre. This specimen,from Arendal,Norway,measures 120 millimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5230 px × 3669 px |
Model Release : | Non requis |
Restrictions : | - |