Botswana agate,microcrystalline variety of silica with grain and colour. Stone with parallel lines and marbled layers | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Natural History Museum, London |
Bildgröße: | 3593 px × 4865 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |