Turquoise. Raw and cut and polished specimens of turquoise (hydrated copper aluminium phosphate). This mineral is one of the most valuable non-transparent minerals. It has been used in jewellery since ancient Egyptians times | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Natural History Museum, London |
Bildgröße: | 3587 px × 4872 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |