mineral
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, golden-brown to yellow-brown color with bands of dark brown and black, silky to vitreous luster, hexagonal (trigonal) crystal system, specific gravity of 2.64 to 2.71
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Physical properties
Mohs hardness of 7, golden-brown to yellow-brown color with bands of dark brown and black, silky to vitreous luster, hexagonal (trigonal) crystal system, specific gravity of 2.64 to 2.71
Formation & geological history
Formed when quartz continuously replaces the fibrous mineral crocidolite (riebeckite) during metasomatism, preserving the fibrous structure.
Uses & applications
Commonly used in cabochons, beads, ornamental carvings, and jewelry.
Geological facts
Tiger's eye exhibits chatoyancy, a distinct optical reflectance effect that resembles the slit eye of a tiger as light catches the parallel fibrous structure.
Field identification & locations
Easily identified by its distinctive golden-brown stripes and silky chatoyant sheen. Major deposits are found in South Africa, Western Australia, and the USA.
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