Star rubies and sapphires. Both these gemstones are varieties of the mineral corundum (aluminium oxide). Rubies are always a shade of red,whereas sapphires comes in a variety of colours | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Natural History Museum, London |
Bildgröße: | 3746 px × 4666 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |