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. This specimen measures 18 x 7 cm and was found in Veadinho's Mine,Marilac,Brazil | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / De Gugliemo, Roberto |
Taille de l’image : | 3511 px × 5042 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |