Amethyst specimen from China. Amethyst is a semiprecious stone. It is a violet or purple form of quartz (silica or silicon dioxide, SiO2). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Turtle Rock Scientific |
Bildgröße: | 5165 px × 3442 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |