Turquoise gemstones. Turquoise (hydrated copper aluminium phosphate) is 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 contain impurities producing other colours,such as green. It has been prized as a gemstone since ancient times,with examples found in early Egyptian jewellery from 6000 BC | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lawry, Lawrence |
Bildgröße: | 4173 px × 3402 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |