mineral

Tiger's Eye

Pseudomorph of Crocidolite (SiO2 with iron oxides)

Hardness: 6.5-7 on Mohs scale; Color: Golden yellow to deep brown; Luster: Silky to vitreous; Crystal structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.71; Chatoyancy: Distinctive 'cat's eye' silky wavy bands.

Hardness: 6
Color: Golden yellow to deep brown
Luster: Silky to vitreous

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed through a process called pseudomorphism, where silica replaces the fibrous mineral crocidolite (asbestos) while maintaining its fibrous structure. Often found in weathered metamorphic rock formations.

Uses & applications

Primarily used in jewelry (beads, cabochons), carvings, decorative ornaments, and widely collected as a semi-precious gemstone and metaphysical stone.

Geological facts

The unique shimmer is due to the 'chatoyant' effect caused by the reflection of light off the parallel fibers within the stone. If the iron content remains in its original form, it is blue and called Hawk's Eye.

Field identification & locations

Identify by rotating under light to see moving golden bands (chatoyancy). Common locations include South Africa (Northern Cape), Western Australia, India, and Namibia. Collectors look for high luster and sharp, centered 'eye' bands.

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