mineral

Tiger's Eye

Quartz (chalcedony) with crocidolite inclusions, SiO2

Hardness 6.5-7 on Mohs scale. Colors range from golden to red-brown, often with varying bands. Silky luster. Trigonal crystal structure (microcrystalline). No cleavage. Specific gravity 2.58-2.64.

Identified June 17, 2026More mineral →

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Physical properties

Hardness 6.5-7 on Mohs scale. Colors range from golden to red-brown, often with varying bands. Silky luster. Trigonal crystal structure (microcrystalline). No cleavage. Specific gravity 2.58-2.64.

Formation & geological history

Formed through the alteration of crocidolite (an asbestos mineral) by silica. As quartz replaces the crocidolite fibers, it retains their fibrous structure, resulting in the chatoyant effect. Commonly found in metamorphic rocks.

Uses & applications

Primarily used as a semi-precious gemstone in jewelry, carvings, and decorative items. Popular among collectors.

Geological facts

Tiger's Eye is famous for its chatoyancy, a moving bands of light that resemble a cat's eye. South Africa and Western Australia are major sources. It was historically believed to bring protection and good luck.

Field identification & locations

Identify by its distinctive silky luster and chatoyant bands of golden to brown color when rotated in light. Found mainly in arid regions. Collectors look for strong chatoyancy and distinct color banding.

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