Agate nodule. Polished slice of the surface of an agate nodule. The outer banded layers are chalcedony (amorphous or non-crystyalline silica). Quartz is the crystalline form of silica,which is at the centre of the slice | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Sambraus, Daniel |
Bildgröße: | 4302 px × 4092 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |