gemstone
Ruby
Corundum (Al2O3:Cr)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, vivid red color due to chromium impurities, adamantine to vitreous luster, and trigonal crystal system.
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Physical properties
Hardness of 9 on the Mohs scale, vivid red color due to chromium impurities, adamantine to vitreous luster, and trigonal crystal system.
Formation & geological history
Formed in metamorphic and igneous environments, such as marble or basalt, under high temperature and pressure over millions of years.
Uses & applications
Extensively used in high-end jewelry, watch bearings, and lasers due to its extreme durability and optical properties.
Geological facts
Ruby is one of the traditional cardinal gemstones and is the red variety of the mineral corundum, while all other colors are classified as sapphire.
Field identification & locations
Identified by its intense red hue, extreme hardness, and lack of cleavage; commonly found in Myanmar, Thailand, and East Africa.
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