A crystal of blue topaz. Topaz is a silicate of aluminium and fluorine and can occur in many colours including yellow,blue,green,violet,reddish-brown and colourless. Clear or finely- coloured varieties are used as gemstones. This specimen measures 15 x 12 cm and was found in Virgem da Lapa,Minas Gerais,Brazil | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / De Gugliemo, Roberto |
Taille de l’image : | 2652 px × 3237 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |