Tiger's Eye

Physical Properties

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71

Formation & Geological History

Formed through a pseudomorphic process where silica (quartz) replaces fibrous crocidolite (blue asbestos) crystals while maintaining the original fibrous structure. The chatoyance results from the reflection of light off these parallel fibers.

Uses & Applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular lapidary material for collectors.

Geological Facts

Tiger's Eye is known for its chatoyancy, an optical effect also known as the 'cat's eye effect.' Historically, it was worn as a protective amulet against curses and ill wishes.

Field Identification & Locations

Identify by its distinct golden-yellow and dark brown bands and its silky chatoyance when rotated under light. Major deposits are found in South Africa, Australia, and India.

Identified on: 5/5/2026

Mode: Standard