mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Golden-brown to yellow with dark stripes; Luster: Silky; Structure: Trigonal/Fibrous; Chatoyancy: High; Specific Gravity: 2.64-2.71

Hardness: 6
Color: Golden-brown to yellow with dark stripes
Luster: Silky

Identified July 19, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Golden-brown to yellow with dark stripes; Luster: Silky; Structure: Trigonal/Fibrous; Chatoyancy: High; Specific Gravity: 2.64-2.71

Formation & geological history

Formed via the replacement of blue asbestos (crocidolite) fibers with translucent quartz through a process called pseudomorphism, resulting in chatoyant bands. Typically found in metamorphosed iron formations.

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collector's stone.

Geological facts

The optical effect is called chatoyancy (cat-eye effect). Historically used as a protective amulet against curses and ill-wishing. It is the anniversary gemstone for the 9th year of marriage.

Field identification & locations

Identified by its distinctive golden-brown bands and silky luster that 'shifts' under light. Most commonly sourced from South Africa and Western Australia. Collectors look for sharp, clean bands.