Bi-coloured tourmaline crystals. Tourmaline is a complex silicate of aluminium and boron which occurs in many colours,including black,brown,blue green red and pink. Bi-coloured crystals such as these are fairly common. The specimen measures 6 x 2.5 cm and was found in Cruzeiro's Mine,Sao Jose da Safira,Brazil | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / De Gugliemo, Roberto |
Taille de l’image : | 3695 px × 4944 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |