gemstone
Green Sapphire
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, green color due to iron and titanium impurities, subadamantine to vitreous luster, and trigonal crystal system.
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Physical properties
Hardness of 9 on the Mohs scale, green color due to iron and titanium impurities, subadamantine to vitreous luster, and trigonal crystal system.
Formation & geological history
Forms in aluminum-rich metamorphic and igneous rocks, particularly pegmatites and alkali basalts, over millions of years.
Uses & applications
Used primarily in fine jewelry making, as well as industrial applications like watch bearings and abrasive windows.
Geological facts
Sapphires belong to the corundum mineral family and come in every color of the rainbow except red, which is classified as ruby.
Field identification & locations
Identified by its exceptional hardness and specific gravity; commonly found in alluvial deposits in countries like Australia, Thailand, and Montana.
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