Tiger's Eye

Physical Properties

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown with silky luster; Crystal Structure: Hexagonal/Trigonal; Special effect: Chatoyancy (cat's eye effect); Specific Gravity: 2.64-2.71

Formation & Geological History

Formed through a process called pseudomorphism where silica (quartz) replaces the fibrous blue mineral crocidolite (asbestos). Most significant deposits are in the Hamersley Range in South Africa, formed millions of years ago in iron-rich metamorphic environments.

Uses & Applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular stone for lapidary collectors and metaphysical practitioners.

Geological Facts

The 'chatoyancy' is caused by light reflecting off the parallel fibers of the quartz. When it is blue (unoxidized), it is known as Hawk's Eye. It was once considered a precious stone more valuable than gold in some ancient cultures.

Field Identification & Locations

Identify in the field by its distinct golden-yellow to brown bands and the way the light appears to move across the surface when tilted. Look for it in iron-rich metamorphic rocks, particularly in South Africa, Australia, and parts of the USA.

Identified on: 4/22/2026

Mode: Standard