Topaz gemstones. This silicate mineral (aluminium silicate fluoride hydroxide) can range in colour from golden brown to yellow. Topaz can be polished in a variety shapes; the opposed bar is seen here. On the Mohs hardness scale it is rated 8 out of 10,with diamond at number 10. It is mined across the world,with notable occurrences in Brazil and Russia | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lawry, Lawrence |
Bildgröße: | 4211 px × 3372 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |