Tiger\'s Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Golden-yellow to deep brown with silky luster; Chatoyancy (cat\'s eye effect); Trigonal crystal system; No cleavage.

Hardness: 7 on Mohs scale
Color: Golden-yellow to deep brown with silky luster

Identified July 13, 2026More metamorphic →

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Physical properties

Hardness: 7 on Mohs scale; Color: Golden-yellow to deep brown with silky luster; Chatoyancy (cat\'s eye effect); Trigonal crystal system; No cleavage.

Formation & geological history

Formed through a metamorphic process known as pseudomorphism where quartz replaces the fibrous mineral crocidolite (blue asbestos) while retaining its fibrous structure.

Uses & applications

Primarily used in jewelry (cabochons and beads), ornamental carvings, and as a popular collectible gemstone for meditation and lapidary art.

Geological facts

It is famous for its chatoyancy, a moving band of light caused by the reflection of light off the parallel mineral fibers. When the iron remains oxidized, it stays golden-brown; if it is naturally heated by the earth, it can turn red (Red Tiger\'s Eye).

Field identification & locations

Identify by rotating under light to observe the shifting gold and brown bands. Commonly found in South Africa, Western Australia, and parts of India and Burma.