mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 7.0 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal/Fibrous; Cleavage: None; Specific Gravity: 2.64-2.71; Chatoyancy (cat's eye effect).

Hardness: 7
Color: Golden to red-brown
Luster: Silky

Identified May 10, 2026More mineral →

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Physical properties

Hardness: 7.0 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal/Fibrous; Cleavage: None; Specific Gravity: 2.64-2.71; Chatoyancy (cat's eye effect).

Formation & geological history

Formed when quartz replaces fibrous crocidolite (blue asbestos) via a pseudomorphous process. Iron within the structure oxidizes to create the golden-brown hues. Most occur in metamorphic rock formations.

Uses & applications

Primarily used in jewelry (beads, cabochons, earrings), ornamental carvings, and spiritual/metaphysical collections.

Geological facts

Tiger's Eye is a 'pseudomorph', meaning one mineral has replaced another while retaining the original mineral's shape and fibrous structure. It is famous for its chatoyancy, which creates a shimmering band of light.

Field identification & locations

Identify by its distinct silky lustre and golden-brown bands that shift as the stone is rotated under light. Common locations include South Africa (Northern Cape), Australia, India, and Namibia.