mineral

Tiger's Eye

Silicon Dioxide with Crocidolite (SiO2)

Hardness: 7 Mohs; Color: golden to red-brown; Luster: silky; Crystal structure: hexagonal/trigonal; Cleavage: none; Specific gravity: 2.64-2.71; Notable for chatoyancy.

Hardness: 7 Mohs
Color: golden to red-brown
Luster: silky

Identified June 21, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: golden to red-brown; Luster: silky; Crystal structure: hexagonal/trigonal; Cleavage: none; Specific gravity: 2.64-2.71; Notable for chatoyancy.

Formation & geological history

Formed by the pseudomorphous replacement of blue crocidolite asbestos by silica, often found in metamorphic rock formations and iron-rich environments.

Uses & applications

Primarily used for jewelry, ornamental carvings, cabochons, and as a popular collector's gemstone due to its unique optical effects.

Geological facts

The 'chatoyant' or cat's-eye effect is caused by the parallel growth of quartz crystals and altered amphibole fibers. It is considered a stone of protection and good luck in various cultures.

Field identification & locations

Identified by its characteristic golden-yellow bands that shift light as the stone is rotated. Commonly found in South Africa, Western Australia, USA, and India.