mineral

Tiger's Eye

Fibrous Quartz (SiO2) with iron inclusions

Hardness: 7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal (fibrous habit); Cleavage: None; Specific Gravity: 2.64-2.71

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

Identified June 5, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal (fibrous habit); Cleavage: None; Specific Gravity: 2.64-2.71

Formation & geological history

Formed when quartz replaces fibrous crocidolite (asbestos) in a process called pseudomorphism, commonly found in metamorphosed iron formations.

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collector's mineral.

Geological facts

It displays a unique optical effect known as chatoyancy, where a silky band of light moves across the surface as the stone is rotated, resembling a cat's eye.

Field identification & locations

Identified by its distinctive golden-brown bands and chatoyant 'eye' effect. Large deposits are found in South Africa, Western Australia, and India.

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