gemstone
Ruby
Corundum (Al2O3:Cr)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, deep red color due to chromium traces, vitreous to adamantine luster, trigonal crystal system, and specific gravity around 4.0.
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Physical properties
Hardness of 9 on the Mohs scale, deep red color due to chromium traces, vitreous to adamantine luster, trigonal crystal system, and specific gravity around 4.0.
Formation & geological history
Forms in metamorphic and igneous environments, such as marble or basalt-associated terranes, over millions of years through high-pressure and high-temperature conditions.
Uses & applications
Extensively used in high-end fine jewelry, watchmaking mechanisms, and industrial lasers.
Geological facts
Ruby is one of the traditional cardinal gemstones, and fine-quality specimens can command higher prices per carat than diamonds.
Field identification & locations
Identified by its extreme hardness, red fluorescence under UV light, and distinct dichroism; commonly sourced from Myanmar, Thailand, and East Africa.
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