Tiger's Eye (Rough)

Physical Properties

Hardness: 6.5–7 on Mohs scale; Color: Golden-brown to yellow-gold; Luster: Silky to dull (rough); Crystal structure: Trigonal/Fibrous; Chatoyancy: Distinct silky band of light; Specific gravity: 2.64–2.71

Formation & Geological History

Formed through the pseudomorphism of blue crocidolite (asbestos) fibers by silica. Over time, the iron within the fibers oxidizes, turning them golden-brown. Primarily found in Precambrian metamorphic formations.

Uses & Applications

Used widely in lapidary work for cabochons, beads, and carvings. Also popular in jewelry and as ornamental stones for collecting.

Geological Facts

Tiger's Eye is a classic example of pseudomorphism, where one mineral replaces another while retaining the original mineral's shape. It is believed by some cultures to provide protection and mental clarity.

Field Identification & Locations

Identify in the field by its distinct golden-brown fibrous appearance and high hardness (it cannot be scratched by a steel knife). Commonly found in South Africa, Australia, and parts of India and the USA.

Identified on: 4/22/2026

Mode: Standard