Pre-cut diamond forms,showing the stages of cutting facets to produce a finished gem. Diamond is a form of carbon,and is the hardest known mineral. Because they are so hard,diamonds are cut and polished using specialist diamond tools,lasers,and abrasive diamond dust | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Landmann, Patrick |
Taille de l’image : | 5120 px × 3413 px |
Model Release : | Non requis |
Restrictions : | - |