Mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Golden-yellow to reddish-brown with blue-gray bands; Luster: Silky; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71.

Hardness: 7 on Mohs scale
Color: Golden-yellow to reddish-brown with blue-gray bands
Luster: Silky

Identified April 6, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Golden-yellow to reddish-brown with blue-gray bands; Luster: Silky; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71.

Formation & geological history

Formed through a process called pseudomorphism, where quartz replaces the fibrous mineral crocidolite while retaining its original shape and structure. Most deposits are millions of years old, found in banded iron formations.

Uses & applications

Used primarily in lapidary work for jewelry (cabochons, beads), decorative carvings, and as a popular collector's mineral.

Geological facts

Tiger's Eye is famous for its chatoyancy, an optical effect also known as the 'cat's eye effect.' The blue variant is known as 'Hawk\'s Eye.' It was historically believed to offer protection and focus to the wearer.

Field identification & locations

Identify in the field by its distinctive golden-brown luster and moving bands of light (chatoyancy) when rotated. Major deposits are found in South Africa, Australia, and Thailand.