mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal/Fibrous; Chatoyancy (cat's eye effect); Specific Gravity: 2.64-2.71

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

Identified June 25, 2026More mineral →

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Physical properties

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal/Fibrous; Chatoyancy (cat's eye effect); Specific Gravity: 2.64-2.71

Formation & geological history

Formed when silica-rich fluids replace the fibrous mineral crocidolite (asbestos) through a process called pseudomorphism. It is primarily found in metamorphic environments involving iron-rich formations.

Uses & applications

Widely used for cabochons, beads, carvings, and various decorative jewelry pieces. It is also a popular stone for metaphysical practitioners and collectors.

Geological facts

Tiger's Eye is a classic example of a pseudomorph. While it was once thought to be a simple replacement, more recent research suggests a 'crack-seal' mechanism where quartz grows in fractures.

Field identification & locations

Identified by its distinctive golden-yellow and brown bands and its silky, shimmering chatoyancy when rotated under light. Major sources include South Africa, Western Australia, and India.

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