mineral

Tiger's Eye

Quartz (SiO2) with fibrous inclusions of Altered Crocidolite

AI-generated identification · may be incorrect

Hardness: 7 Mohs; Color: Golden-brown to yellow with dark bands; Luster: Silky; Crystal Structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71

Hardness: 7 Mohs
Color: Golden-brown to yellow with dark bands
Luster: Silky

Identified May 5, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Golden-brown to yellow with dark bands; Luster: Silky; Crystal Structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71

Formation & geological history

Formed through a pseudomorphic process where silica replaces fibrous crocidolite (asbestos) while maintaining original structure, often associated with banded iron formations over 2 billion years old.

Uses & applications

Widely used in jewelry for cabochons and beads, ornamental carvings, and popular in lapidary arts and metaphysical collecting.

Geological facts

Displays a optical phenomenon called chatoyancy (the 'cat's eye') caused by the reflection of light off parallel mineral fibers. It is primarily sourced from South Africa and Western Australia.

Field identification & locations

Identified in the field by its distinct golden-to-brown bands and chatoyant 'shimmer' when rotated under light. Look for parallel fibrous structures and high silica hardness.