mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Hardness: 6.5-7.0 (Mohs), Color: Golden brown to brownish-yellow, Luster: Silky/Vitreous, Structure: Hexagonal (trigonal), Specific Gravity: 2.64-2.71

Hardness: 6

Identified May 18, 2026More mineral →

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Physical properties

Hardness: 6.5-7.0 (Mohs), Color: Golden brown to brownish-yellow, Luster: Silky/Vitreous, Structure: Hexagonal (trigonal), Specific Gravity: 2.64-2.71

Formation & geological history

Formed as a pseudomorph when blue crocidolite (asbestos) fibers are replaced by silica (quartz) while retaining their fibrous structure. Most deposits are Precambrian in age.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for crystal healing collectors.

Geological facts

Tiger's Eye displays a unique optical phenomenon called chatoyancy (the cat's-eye effect), caused by light reflecting off the parallel fibers of the mineral inside the quartz.

Field identification & locations

Identified by its distinctive golden-brown bands and moving 'cat-eye' reflection when tilted. Found prominently in South Africa, Australia, and Namibia. Collectors look for high luster and sharp chatoyancy.

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