mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)

Hardness: 6.5-7 (Mohs scale); Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71.

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

Identified March 9, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71.

Formation & geological history

Formed through a process called pseudomorphism, where quartz replaces the fibrous mineral crocidolite (blue asbestos) over millions of years. The iron within the original mineral oxidizes, creating the characteristic golden-brown bands.

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular specimen for collectors and metaphysical enthusiasts.

Geological facts

Tiger's Eye exhibits a unique optical effect known as chatoyancy or the 'eye of the cat' effect. Historically, it was worn by Roman soldiers in battle for protection and used as a talisman against the 'evil eye'.

Field identification & locations

Identify in the field by its distinct chatoyant 'shimmer' when rotated under light and its parallel golden-brown bands. Commonly found in South Africa, Western Australia, India, and Myanmar.

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