gemstone
Ruby
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale. Red to purplish-red color due to chromium impurities, with an adamantine to vitreous luster.
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Physical properties
Hardness of 9 on the Mohs scale. Red to purplish-red color due to chromium impurities, with an adamantine to vitreous luster.
Formation & geological history
Forms in metamorphic and igneous environments, such as marble or basalt, typically during high-grade regional or contact metamorphism.
Uses & applications
Extensively used in high-end jewelry, watchmaking bearings, and historical laser technology.
Geological facts
Ruby is one of the traditional cardinal gemstones. Pigeon's blood rubies from Myanmar are the most prized and valuable specimens globally.
Field identification & locations
Identified by its extreme hardness and characteristic red fluorescence under ultraviolet light. Commonly sourced from Myanmar, Thailand, and East Africa.
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