Mineral

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

Hardness: 6.5–7 on Mohs scale; Color: Golden yellow to brown with chatoyant fibers; Luster: Silky; Crystal System: Trigonal (fibrous aggregate); Cleavage: None; Specific Gravity: 2.64–2.71.

Hardness: 6
Color: Golden yellow to brown with chatoyant fibers
Luster: Silky

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 6.5–7 on Mohs scale; Color: Golden yellow to brown with chatoyant fibers; Luster: Silky; Crystal System: Trigonal (fibrous aggregate); Cleavage: None; Specific Gravity: 2.64–2.71.

Formation & geological history

Formed when quartz replaces the blue crocidolite asbestos fibers through a process of pseudomorphism, where the original shape of the fibers is preserved but the chemical composition changes. This occurs in metamorphic rocks and iron formations.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular metaphysical or balancing stone for collectors.

Geological facts

Tiger's Eye exhibits a unique optical effect called chatoyancy (cat's eye effect) caused by the parallel reflection of light off the internal fibrous structure. If the quartz replacement is incomplete, it remains blue and is called Hawk's Eye.

Field identification & locations

Identify in the field by its distinct golden-brown bands and 'shimmer' when rotated under light. Commonly found in South Africa (Northern Cape), Australia, Myanmar, and Namibia. Collectors should look for vibrant banding and high chatoyancy.

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