mineral

Tiger's Eye

Pseudomorph of Quartz (SiO2) after Crocidolite

Hardness: 7 Mohs, Color: Golden to red-brown, Luster: Silky/Vitreous, Structure: Trigonal (fibrous), Cleavage: None, Specific Gravity: 2.64-2.71

Identified May 30, 2026More mineral →

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Physical properties

Hardness: 7 Mohs, Color: Golden to red-brown, Luster: Silky/Vitreous, Structure: Trigonal (fibrous), Cleavage: None, Specific Gravity: 2.64-2.71

Formation & geological history

Formed when iron-rich quartz replaces parallel fibrous veins of the mineral crocidolite through a process of pseudomorphism, primarily found in metamorphic environments.

Uses & applications

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

Geological facts

It exhibits a phenomenon known as chatoyancy or the 'cat\'s eye' effect, caused by the reflection of light off the parallel mineral fibers within the stone.

Field identification & locations

Identified by its distinctive golden-brown bands and chatoyant silky luster. Commonly found in South Africa and Western Australia. Best identified by moving the stone under light to see the shimmering bands.

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