gemstone
Cat's Eye Chrysoberyl
Chrysoberyl (BeAl2O4)
AI-generated identification · may be incorrectHardness of 8.5 on the Mohs scale, vitreous to greasy luster, exhibiting chatoyancy (cat's eye effect) due to parallel microscopic inclusions.
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Physical properties
Hardness of 8.5 on the Mohs scale, vitreous to greasy luster, exhibiting chatoyancy (cat's eye effect) due to parallel microscopic inclusions.
Formation & geological history
Forms in pegmatites and metamorphic rocks through pneumatolytic or metasomatic processes involving beryllium and aluminum-rich fluids.
Uses & applications
Highly prized in fine jewelry, specifically cut as cabochons to best display the optical chatoyant band.
Geological facts
Known as cymophane, the name derives from Greek words meaning wave and appearance, describing its shimmering optical phenomenon.
Field identification & locations
Identified by its distinctive moving band of light across a polished cabochon surface; primarily sourced from Sri Lanka, Brazil, and India.
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