Aluminum oxide (known in its naturally occurring,crystalline form as corundum) and a cut ruby. Rubies are an impure form of aluminum oxide,which is used in grinding wheels and sand paper. Rubies are used in jewelry and lasers | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Winters, Charles D. |
Taille de l’image : | 4513 px × 4500 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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