gemstone
Tiger's Eye
Silicon dioxide with crocidolite, SiO2
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, golden to brown color with a chatoyant luster, and a microcrystalline quartz crystal structure.
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Physical properties
Hardness of 7 on the Mohs scale, golden to brown color with a chatoyant luster, and a microcrystalline quartz crystal structure.
Formation & geological history
Formed when quartz pseudomorphs over altered amphibole mineral crocidolite, typically in Precambrian metamorphic rocks.
Uses & applications
Widely used in jewelry, cabochons, carvings, and as a decorative ornamental stone.
Geological facts
The distinctive cat's-eye effect is caused by parallel fibrous inclusions of asbestos fibers transformed into quartz.
Field identification & locations
Identified by its characteristic golden-brown silky bands and chatoyancy; commonly mined in South Africa and Australia.
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