mineral
Ruby
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, red to pink color due to chromium, vitreous luster, trigonal crystal system, and no true cleavage.
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Physical properties
Hardness of 9 on the Mohs scale, red to pink color due to chromium, vitreous luster, trigonal crystal system, and no true cleavage.
Formation & geological history
Forms in metamorphic or igneous rocks like marble and basalt through high-temperature and high-pressure crystallization over millions of years.
Uses & applications
Highly prized as a gemstone in fine jewelry and used in laser technology and watch bearings.
Geological facts
Ruby is one of the traditional cardinal gemstones and derives its name from ruber, the Latin word for red.
Field identification & locations
Identified by its extreme hardness, hexagonal crystal habit, and distinct red fluorescence under UV light. Found in Myanmar, Thailand, and East Africa.
