gemstone
Ruby
Corundum (Al2O3)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, red to pinkish-red color due to chromium, subadamantine to vitreous luster, and hexagonal crystal system.
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Physical properties
Hardness of 9 on the Mohs scale, red to pinkish-red color due to chromium, subadamantine to vitreous luster, and hexagonal crystal system.
Formation & geological history
Forms in metamorphic and igneous rocks, specifically marble and basalt, through high-temperature regional or contact metamorphism.
Uses & applications
Extensively used in high-end jewelry, luxury timepieces, and laser technology.
Geological facts
Ruby is one of the traditional cardinal gemstones, with top-quality specimens commanding higher per-carat prices than diamonds.
Field identification & locations
Identified by its extreme hardness, characteristic red fluorescence under UV light, and hexagonal barrel-shaped crystal habit.
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