Wood tin. Dark-brown banded aggregates of cassiterite,a variety of cassiterite,intergrown with quartz (white) and tourmaline (black). Cassiterite is a tin oxide and important ore of tin. Polished specimen is from West Kitty mine,St. Agnes,Cornwall,UK | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Natural History Museum, London |
Taille de l’image : | 3487 px × 2507 px |
Model Release : | Non requis |
Restrictions : | - |