Ruby. The specimen at top has been polished the specimen at bottom is in its natural state. Ruby is a variety of corundum (aluminium oxide) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Biddle, Paul |
Bildgröße: | 4488 px × 4503 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |