metamorphic

Tiger's Eye (often misinterpreted as Gold Ore in this context)

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Golden-yellow to brown; Luster: Silky; Structure: Fibrous/trigonal; Cleavage: None; Specific Gravity: 2.64-2.71; Notable for chatoyancy.

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

Identified February 16, 2026More metamorphic →

Explore Tiger's Eye (often misinterpreted as Gold Ore in this context) in the encyclopedia →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Golden-yellow to brown; Luster: Silky; Structure: Fibrous/trigonal; Cleavage: None; Specific Gravity: 2.64-2.71; Notable for chatoyancy.

Formation & geological history

Formed when quartz replaces the blue crocidolite asbestos fibers through a process of pseudomorphism, typically found in iron-rich metamorphic formations. Primary deposits date back to the Proterozoic era.

Uses & applications

Used extensively in the jewelry industry for cabochons, beads, and carvings. Also popular in lapidary arts and as a metaphysical collector's stone.

Geological facts

The 'gold' appearance is caused by the oxidation of iron within the fibrous structure. Despite the user caption 'natural gold', this specimen is a silicate mineral and contains no actual metallic gold.

Field identification & locations

Identify by its 'cat's eye' effect (chatoyancy) which shifts light as the stone is turned. Commonly found in South Africa (Griqualand West), Western Australia, and India.