Precious gemstones of ruby (red) and sapphire (blue),which are varieties of the mineral corundum (aluminium oxide). Gemstones are solid crystalline substances (minerals),formed by natural processes,which are prized by collectors and used in jewellery. Cut and polished stones utilize the refraction of light to enhance their appearance | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lawry, Lawrence |
Bildgröße: | 3585 px × 3975 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |