mineral
Red Tiger's Eye
SiO2 (Silicon Dioxide) - Pseudomorph of Quartz after Crocidolite
AI-generated identification · may be incorrectHardness: 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
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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.
