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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / De Gugliemo, Roberto |
Bildgröße: | 3695 px × 4944 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |