Artificial carborundum specimens. Aggregate of black lustrous hexagonal carborundum crystals (left),and ground carborundum powder (right). Carborundum,an artificial material,is used to produced 'emery cloth' | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Natural History Museum, London |
Bildgröße: | 4683 px × 3731 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |