gemstone
Ruby
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, vibrant red color due to chromium, subadamantine to vitreous luster, and trigonal crystal system.
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Physical properties
Hardness of 9 on the Mohs scale, vibrant red color due to chromium, subadamantine to vitreous luster, and trigonal crystal system.
Formation & geological history
Formed in metamorphic and igneous rocks, specifically marbles and aluminum-rich silicates, through regional or contact metamorphism over millions of years.
Uses & applications
Highly prized in fine jewelry, used in laser technology, and utilized for precision instrument bearings.
Geological facts
Ruby is a variety of the mineral corundum, with all other color varieties being classified as sapphire. Finest rubies historically originate from Myanmar (Burma).
Field identification & locations
Identified by its extreme hardness, red fluorescence under UV light, and characteristic hexagonal crystal habit. Found in countries like Myanmar, Thailand, Sri Lanka, and East Africa.
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