mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal (fibrous); Cleavage: None; Specific gravity: 2.64-2.71.

Hardness: 7 (Mohs scale)
Color: Golden to red-brown
Luster: Silky

Identified June 28, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal (fibrous); Cleavage: None; Specific gravity: 2.64-2.71.

Formation & geological history

Formed when quartz replaces fibrous crocidolite (blue asbestos) through a process of pseudomorphism, typically found in iron-rich metamorphic rocks formed millions of years ago in Precambrian formations.

Uses & applications

Predominantly used as a gemstone in jewelry, beads, cabochons, and decorative carvings. Highly valued in lapidary arts for its chatoyancy.

Geological facts

Tiger's eye is a 'chatoyant' gemstone, meaning it reflects light like a cat's eye. It is considered a metamorphic rock by some but is technically a mineral variety of quartz.

Field identification & locations

Identify by its golden-brown bands and distinct 'sheen' or silky luster when moved in light. Commonly found in South Africa, Western Australia, and Namibia.