gemstone
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
Hardness of 7 on the Mohs scale; exhibits a distinctive chatoyant luster (silky sheen); colors range from golden brown to yellow-brown with dark stripes; trigonal crystal system; specific gravity of 2.64 to 2.71.
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Physical properties
Hardness of 7 on the Mohs scale; exhibits a distinctive chatoyant luster (silky sheen); colors range from golden brown to yellow-brown with dark stripes; trigonal crystal system; specific gravity of 2.64 to 2.71.
Formation & geological history
Formed when quartz constantly replaces the original mineral crocidolite (blue asbestos) as it alters, preserving the fibrous structure. Found in metamorphic rocks and ancient sedimentary deposits, primarily in South Africa and Australia.
Uses & applications
Widely used in jewelry, cabochons, beads, and ornamental carvings as well as spiritual and holistic collection.
Geological facts
Tiger's eye is a classic example of chatoyancy, an optical reflectance effect seen in certain gemstones due to parallel inclusions of fibrous material.
Field identification & locations
Easily identified by its golden-brown stripes and the distinct cat's-eye moving light effect across the surface when polished.
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