Tiger's Eye

Physical Properties

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

Formation & Geological History

Formed through the replacement of fibrous crocidolite (blue asbestos) with silica. It is often found in banded iron formations that have undergone metamorphic pressure. Major deposits are found in Northern Cape Province, South Africa and Western Australia.

Uses & Applications

Primarily used in jewelry (cabochons and beads), ornamental carvings, and as a popular semi-precious gemstone for collectors and metaphysical practitioners.

Geological Facts

The 'cat's eye' effect, known as chatoyancy, is caused by the parallel orientation of the asbestos fibers that have been replaced by quartz. When tilted, the bands of light seem to move across the stone's surface.

Field Identification & Locations

Identify in the field by its distinct golden-yellow shimmering bands and fibrous appearance. It is commonly found in iron-rich metamorphic environments. For collectors, look for high luster and well-defined chatoyant bands.

Identified on: 4/17/2026

Mode: Standard