Sample of sapphire
Numéro d’image : 11741997
| Sample of sapphire. Sapphire is a form of corundum (aluminium oxide),with a colourless or blue colour. Corundum is an accessory mineral of igneous rocks which are under-saturated with respect to silica,or in high-grade metamorphic rocks poor in silica and rich in aluminium (eg marble). Clear,coloured varieties of corundum are highly-prized as gemstones. Red coloured corundum is known as ruby,green coloured corundum is known as emerald. This sample was found in Sri Lanka | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Fisher, Arnold |
| Taille de l’image : | 3692 px × 2480 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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