gemstone
Cat's Eye Chrysoberyl
BeAl2O4
AI-generated identification · may be incorrectHardness of 8.5 on Mohs scale, golden-brown to yellow-green color, vitreous luster, orthorhombic crystal system, exhibits chatoyancy.
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Physical properties
Hardness of 8.5 on Mohs scale, golden-brown to yellow-green color, vitreous luster, orthorhombic crystal system, exhibits chatoyancy.
Formation & geological history
Forms in pegmatites and metamorphic rocks through hydrothermal processes involving beryllium-rich fluids interacting with surrounding rock.
Uses & applications
Used primarily as a high-value gemstone in fine jewelry and as a collector's specimen.
Geological facts
The optical phenomenon known as chatoyancy or cat's-eye effect is caused by tiny parallel inclusions of rutile needles.
Field identification & locations
Identified by a distinct, sharp band of light gliding across the polished surface when rotated under a direct light source.
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