Tiger's Eye

Physical Properties

Hardness: 7 on Mohs scale; Color: Golden-yellow to brown (iron-rich) with possible blue/green tones; 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 the fibrous mineral crocidolite (blue asbestos) while retaining the fibrous structure. The chatoyancy (cat-eye effect) is caused by the light reflecting off these embedded fibers.

Uses & Applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collector's mineral for metaphysical purposes.

Geological Facts

Tiger's Eye is a classic example of a pseudomorph. If the original blue crocidolite is not fully oxidized to yellow/brown by iron, it is known as Hawk's Eye (blue) instead of Tiger's Eye.

Field Identification & Locations

Identify in the field by its distinct chatoyancy (the shimmering band of light that moves as the stone is turned) and fibrous bands. Commonly found in South Africa, Australia, and Brazil.

Identified on: 5/2/2026

Mode: Standard