Mineral (Metamorphic pseudomorph)

Tiger's Eye

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71.

Hardness: 6
Color: Golden to red-brown
Luster: Silky

Identified April 4, 2026More mineral (metamorphic pseudomorph) →

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Physical properties

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71.

Formation & geological history

Formed when quartz replaces the fibrous mineral crocidolite (blue asbestos) through a process called pseudomorphism. As the quartz infiltrates the fibers, iron oxides stain the material golden-brown.

Uses & applications

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

Geological facts

Tiger's eye exhibits a unique optical effect known as chatoyancy, where light reflects off the fibrous inclusions to create a band of light resembling a cat's eye. It is the traditional stone for the 9th wedding anniversary.

Field identification & locations

Identify by its distinct golden-brown banding and chatoyant 'shimmer' when rotated under light. Major deposits are found in South Africa (Northern Cape Province), Western Australia, India, and Namibia.