gemstone
Ruby
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, pink to blood-red color due to chromium traces, vitreous luster, and trigonal crystal system.
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Physical properties
Hardness of 9 on the Mohs scale, pink to blood-red color due to chromium traces, vitreous luster, and trigonal crystal system.
Formation & geological history
Forms in metamorphic and igneous rocks, specifically marbles and aluminum-rich pegmatites, over millions of years through high-pressure and temperature conditions.
Uses & applications
Extensively used in high-end jewelry, luxury timepieces, and industrial laser technology.
Geological facts
Ruby is one of the traditional cardinal gemstones and derives its red color from trace amounts of the element chromium.
Field identification & locations
Identified by its extreme hardness, high specific gravity, and distinctive red fluorescence under ultraviolet light; commonly sourced from Myanmar, Thailand, and East Africa.
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