Sample of cassiterite. Cassiterite,a form of tin oxide,occur either as stubby prismatic crystals or (as here) a black granular mass. When cut in section and polished,the inner banded structure has the appearance of burr wood,known as 'wood tin'. Cassiterite is a major ore of tin. This sample was found in Cornwall | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Fisher, Arnold |
Taille de l’image : | 4993 px × 3374 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |