Ochre quarry. Close-up of a chunk of red ochre at an ochre quarry. Ochres are among the earliest pigments used by mankind. They can be various yellow,brown and reddish colours,and are derived from clay that is naturally tinted due to the presence of mineral oxides. Photographed in Saint-Amand en Puisaye,France | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Psaila, Philippe |
Bildgröße: | 5125 px × 3411 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |