Tiger's Eye

Physical Properties

Hardness: 6.5-7.0 (Mohs scale), Color: Golden to red-brown, Luster: Silky, Crystal Structure: Trigonal (fibrous habit), Cleavage: None, Specific Gravity: 2.64-2.71

Formation & Geological History

Formed through the pseudomorphism of crocidolite (blue asbestos) crystals by quartz. The iron from the crocidolite oxidizes into limonite or goethite, giving it the golden-brown color. Predominantly found in Precambrian metamorphic rocks.

Uses & Applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for crystal healing and mineral collecting.

Geological Facts

Tiger's eye is famous for its chatoyancy, an optical phenomenon where a band of light reflects across the fibrous structure of the stone, moving as the stone is turned, resembling a cat's eye.

Field Identification & Locations

Identify by its distinctive silky luster and moving bands of light (chatoyancy). It is commonly found in South Africa (Griquland West), Australia, India, and Thailand. To identify in the field, look for fibrous textures alongside brown/gold iron staining.

Identified on: 4/23/2026

Mode: Standard