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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lawry, Lawrence |
Taille de l’image : | 4173 px × 3402 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |