mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Golden to red-brown; Luster: Silky; Structure: Hexagonal (trigonal); Features strong chatoyancy (cat's eye effect).

Hardness: 6
Color: Golden to red-brown
Luster: Silky

Identified July 5, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Golden to red-brown; Luster: Silky; Structure: Hexagonal (trigonal); Features strong chatoyancy (cat's eye effect).

Formation & geological history

Formed through a process called pseudomorphism, where silica replaces the mineral crocidolite (asbestos) while maintaining its fibrous structure. It is commonly associated with metamorphic rocks.

Uses & applications

Primarily used in jewelry for rings, beads, and pendants, and as an ornamental stone for carvings and decorative objects.

Geological facts

The 'cat's eye' effect is caused by the parallel orientation of the quartz fibers and the presence of iron oxides. Historically, it was worn as a protective amulet against curses and bad luck.

Field identification & locations

Identified by its distinctive golden-brown bands and silky luster that seems to move when tilted in light. Major sources include South Africa, Australia, Burma, and India.