metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Limonite inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs scale), Color: golden to red-brown, Luster: silky, Crystal structure: Trigonal (fibrous texture), specific gravity: 2.64-2.71. Displays strong chatoyancy.

Hardness: 6

Identified July 14, 2026More metamorphic →

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Physical properties

Hardness: 6.5-7.0 (Mohs scale), Color: golden to red-brown, Luster: silky, Crystal structure: Trigonal (fibrous texture), specific gravity: 2.64-2.71. Displays strong chatoyancy.

Formation & geological history

Formed when the fibrous mineral crocidolite (blue asbestos) is replaced by silica (quartz) while retaining its fibrous structure, often associated with banded iron formations. Most deposits are approximately 2 billion years old.

Uses & applications

Extensively used in jewelry (beads, cabochons), ornamental carvings, and as a popular chakara or healing stone in metaphysical communities.

Geological facts

Tiger's Eye is a classic example of a pseudomorph; it is also a chatoyant gemstone that produces a 'cat's eye' effect when light reflects off the fibrous inclusions.

Field identification & locations

Identified by its distinctive golden-brown bands and silky, moving light effect (chatoyancy). Primary source is the Northern Cape Province in South Africa and the Pilbara region of Australia.