mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Hardness: 6.5-7 (Mohs scale); Color: Golden to red-brown; Luster: Silky; Crystal structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.64-2.71. It displays a chatoyant (cat-eye) effect.

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

Identified June 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed through a pseudomorphic process where silica replaces the fibrous mineral crocidolite (asbestiform riebeckite) while maintaining its fibrous structure. They are typically found in hydrothermal vein deposits.

Uses & applications

Primarily used in jewelry for cabochons, beads, and carvings, as well as in ornamental objects and as a collector's mineral.

Geological facts

The chatoyancy is caused by the replacement of asbestos fibers by quartz, which creates a 'moving' light effect when the stone is rotated. It is believed to bring good luck and protection to the wearer in various cultures.

Field identification & locations

Identified by its distinctive golden-brown banded appearance and strong chatoyancy. Found commonly in South Africa (Northern Cape), Australia, India, and Myanmar. Field identification relies on the moving band of light and fibrous appearance under the polished surface.

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