gemstone
Blue Sapphire
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, deep blue color from iron and titanium impurities, vitreous luster, and trigonal crystal system.
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Physical properties
Hardness of 9 on the Mohs scale, deep blue color from iron and titanium impurities, vitreous luster, and trigonal crystal system.
Formation & geological history
Formed in metamorphic or igneous rocks like basalt and marble under high temperature and pressure over millions of years.
Uses & applications
Extensively used in high-end jewelry, luxury watches, and industrial applications requiring extreme scratch resistance.
Geological facts
Sapphire is the September birthstone and shares the exact mineral species as ruby, differing only in color.
Field identification & locations
Identified by its exceptional hardness, high specific gravity, and distinct dichroism; primarily mined in Sri Lanka, Madagascar, and Myanmar.
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