Tiger's Eye

Physical Properties

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

Formation & Geological History

Formed when quartz replaces fibrous crocidolite (blue asbestos) through a process of pseudomorphism, where the original mineral shape is preserved but replaced by silica. The golden color comes from iron oxides. Most deposits are found in Precambrian rock formations.

Uses & Applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular lapidary or metaphysical collection stone.

Geological Facts

Tiger's Eye exhibits a unique optical property called chatoyancy (the 'cat's-eye effect'), where bands of light shift across the surface as the stone is turned. It is considered a metamorphic rock due to the hydrothermal replacement process.

Field Identification & Locations

Identify in the field by its distinct parallel fibrous structure and silky golden-brown bands. It is most commonly found in South Africa, Western Australia, India, and Thailand. Collectors should look for sharp, moving light bands.

Identified on: 5/18/2026

Mode: Standard