mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Hardness: 6.5-7 (Mohs scale), Color: Golden brown to yellow-gold with dark bands, Luster: Silky/Vitreous, Structure: Trigonal (fibrous texture), Specific Gravity: 2.64-2.71

Hardness: 6

Identified May 22, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Golden brown to yellow-gold with dark bands, Luster: Silky/Vitreous, Structure: Trigonal (fibrous texture), Specific Gravity: 2.64-2.71

Formation & geological history

Formed through a pseudomorphic process where quartz replaces fibrous crocidolite (blue asbestos) while preserving the fibrous structure. Often found in Precambrian iron formations.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular collector's mineral.

Geological facts

The optical effect seen in Tiger's Eye is called chatoyancy, or the 'cat-eye' effect, caused by the reflection of light off the parallel mineral fibers.

Field identification & locations

Identified by its distinctive golden-brown striped appearance and silky chatoyancy when tilted. Commonly found in South Africa, Western Australia, and India.

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