Cut and polished diamond. Diamond is a naturally occurring form of carbon that has crystallised under great pressure. Pure crystals are colourless and transparent. Some varieties are yellow,brown or black. A diamond can be polished to sparkle in the light. Diamond is the hardest known mineral. Poorer quality specimens are used in industry,mainly as cutting and grinding tools | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lawry, Lawrence |
Taille de l’image : | 3795 px × 4644 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |