mineral

Red Tiger's Eye

SiO2 (Silicon Dioxide) - Pseudomorph of Quartz after Crocidolite

Hardness: 6.5–7 (Mohs scale); Color: Reddish-brown to maroon with dark banding; Luster: Silky; Crystal structure: Trigonal (fibrous aggregate); Cleavage: None; Specific gravity: 2.64–2.71.

Hardness: 6
Color: Reddish-brown to maroon with dark banding
Luster: Silky

Identified March 30, 2026More mineral →

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Physical properties

Hardness: 6.5–7 (Mohs scale); Color: Reddish-brown to maroon with dark banding; Luster: Silky; Crystal structure: Trigonal (fibrous aggregate); Cleavage: None; Specific gravity: 2.64–2.71.

Formation & geological history

Formed when golden Tiger's Eye is subjected to natural heat or through artificial heat treatment, causing the oxidation of iron inclusions (limonite to hematite). Originally formed by the replacement of fibrous asbestos (crocidolite) with silica.

Uses & applications

Predominantly used for lapidary purposes including jewelry (beads, cabochons), carvings, tumbled pocket stones, and metaphysical collection.

Geological facts

Red Tiger's Eye is also known as 'Dragon's Eye.' While some occur naturally via geothermal heating or forest fires, most red specimens on the market are created by gently heating golden Tiger's Eye.

Field identification & locations

Identify in the field by its distinct chatoyancy (the 'cat's eye' effect) and fibrous texture visible under the surface. Commonly sourced from South Africa, Western Australia, and Namibia.

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