mineral

Tiger's Eye (Golden)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

Hardness: 6.5-7 (Mohs scale); Color: Golden to brownish-yellow with silky luster; Crystal Structure: Hexagonal (trigonal); Chatoyant effect (cat's eye); Specific Gravity: 2.64-2.71.

Hardness: 6
Color: Golden to brownish-yellow with silky luster

Identified March 22, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Golden to brownish-yellow with silky luster; Crystal Structure: Hexagonal (trigonal); Chatoyant effect (cat's eye); Specific Gravity: 2.64-2.71.

Formation & geological history

Formed through a metamorphic process known as pseudomorphism, where quartz replaces the fibrous mineral crocidolite (blue asbestos) while maintaining the original fibrous structure. Most deposits are Proterozoic in age (approx. 2 billion years old).

Uses & applications

Primary use is in jewelry (cabochons, beads), decorative carvings, and as a popular semi-precious stone for gemstone collectors and metaphysical enthusiasts.

Geological facts

Roman soldiers wore Tiger's Eye for protection in battle. It is famous for its chatoyancy, an optical phenomenon where a band of light moves across the stone due to the fibrous structure of the mineral reflecting light.

Field identification & locations

Identify in the field by its distinct yellow-gold banding and the 'cat's eye' shimmer when tilted. It is most famously found in the Griqualand West region of South Africa and Western Australia. Collectors look for high luster and sharp, distinct bands of light.

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