Turquoise gemstone. Close-up of the veins within turquoise (hydrated copper aluminium phosphate),the most valuable non-transparent gemstone. Its name,although now related to its colour,comes from a French word for stone of Turkey. Turquoise gems may include impurities producing other colours,such as green. It has been prized as a gemstone since ancient times,with examples found from 6000 BC | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lawry, Lawrence |
Bildgröße: | 3675 px × 3916 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |