Faceted oval gemstones cut from synthetic corundum. Pure corundum,aluminum oxide,is colorless,but small amounts of chemical impurities create myriad hues. The red variety of gem quality corundum has a specific name: ruby. All other gem corundums are termed sapphire. Massive,non-gem corundum is used as an abrasive. Corundum is produced synthetically in the laboratory by a variety of methods. The synthetic (man-made) material has optical and other properties nearly identical to natural corundum | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Arem, Joel |
Taille de l’image : | 3820 px × 2550 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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