mineral

Tiger's Eye

Silicified Riebeckite Asbestos (SiO2 with Iron Oxide inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Golden brown to blackish brown with golden bands, Luster: Silky to vitreous, Crystal Structure: Trigonal (fibrous texture), Cleavage: None, Specific Gravity: 2.64-2.71

Hardness: 6

Identified May 31, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the pseudomorphism of crocidolite (blue asbestos) by silica. As the mineral is replaced by quartz, iron from the original fibers oxidizes to produce the characteristic gold-brown color. Found predominantly in metamorphosed iron formations.

Uses & applications

Primarily used in jewelry for cabochons, beads, and carvings. Also popular as a decorative stone in small ornaments and for metaphysical collecting.

Geological facts

Tiger's Eye exhibits a phenomenon called chatoyancy, or the 'cat-eye effect', caused by the reflection of light off the parallel mineral fibers. Historically, it was worn as a protective amulet against curses and ill-wishes.

Field identification & locations

Identified in the field by its distinct banding and silky chatoyant shimmer when rotated in the light. It is commonly found in South Africa, Western Australia, India, and Myanmar. Use a hardness test; it should scratch glass.