Tiger's Eye

Physical Properties

Hardness: 6.5-7 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal/Fibrous; Cleavage: None; Specific Gravity: 2.64-2.71.

Formation & Geological History

Formed when quartz replaces parallel fibers of crocidolite asbestos through a process called pseudomorphism. It is often found in metamorphosed iron formations, typically associated with Precambrian geological eras.

Uses & Applications

Primary use is in jewelry (cabochons, beads) and ornamental carvings due to its chatoyancy. Also a popular collector's mineral and used in metaphysical practices.

Geological Facts

The 'cat's eye' effect, known as chatoyancy, is caused by the reflection of light off the fibrous structure of the mineral. If the specimen's iron content is lower, it can appear blue, known as Hawk's Eye.

Field Identification & Locations

Identify by its unique silky banding and chatoyant 'shimmer' when rotated under light. Common locations include South Africa (Northern Cape), Western Australia, India, and Namibia.

Identified on: 5/1/2026

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