gemstone
Blue Sapphire
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, deep blue color due to 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 due to iron and titanium impurities, vitreous luster, and trigonal crystal system.
Formation & geological history
Forms within igneous and metamorphic rocks under high temperatures and pressures, typically in basaltic terrains or marble deposits.
Uses & applications
Extensively used in fine jewelry, watch components, and scientific instrumentation due to its extreme durability.
Geological facts
Sapphire is the September birthstone and chemically identical to ruby, which is simply the red variety of corundum.
Field identification & locations
Identified by its high scratch resistance, vitreous luster, and distinct dichroism; commonly sourced from Sri Lanka, Madagascar, and Myanmar.
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