mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal system: Trigonal (fibrous texture); Chatoyancy (cat's eye effect); Specific Gravity: 2.64-2.71.

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

Identified June 21, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal system: Trigonal (fibrous texture); Chatoyancy (cat's eye effect); Specific Gravity: 2.64-2.71.

Formation & geological history

Formed through the replacement of fibrous blue crocidolite asbestos by silica (chalcedony/quartz), a process known as pseudomorphism. Iron oxide inclusions provide the golden-brown color. Found in banded iron formations.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, meditation stones, and metaphysical collecting.

Geological facts

It is a famous example of chatoyancy. When cut into a cabochon, the light reflects off the fibrous inclusions to create a distinct shimmering line that moves with the light, similar to a tiger's eye.

Field identification & locations

Identify by its characteristic golden-yellow to brown stripes and silky chatoyant luster. Common locations include South Africa (Northern Cape province), Western Australia, India, and Namibia.