gemstone

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Hardness: 7 on Mohs scale. Color: Golden to red-brown, with silky luster and characteristic chatoyancy (cat's-eye effect). Crystal structure: Trigonal (microcrystalline aggregate). Cleavage: None. Specific gravity: 2.64-2.71.

Hardness: 7 on Mohs scale

Identified July 24, 2026More gemstone →

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Physical properties

Formation & geological history

Metamorphic process where blue asbestos (crocidolite) fibers are gradually replaced by quartz while retaining the fibrous shape (pseudomorphism). Limonite iron oxides give it the golden-yellow color. Major deposits date from Precambrian formations.

Uses & applications

Popular as an ornamental stone, lapidary cabochons, beads, carvings, and in jewelry design. Highly valued in crystal collecting and decorative crafts.

Geological facts

The unique optical effect called chatoyancy is caused by the parallel orientation of embedded fibrous structures reflecting light in shifting bands, resembling the eye of a tiger.

Field identification & locations

Identified by its rich golden-yellow and brown bands and distinct shimmering chatoyant effect when rotated under light. Major locations include South Africa, Western Australia, India, Burma, Namibia, and the United States.

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Silicon Dioxide (SiO2) with Hematite inclusions

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