mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Golden yellow to brown with silky chatoyancy; Luster: Silky/Vitreous; Crystal Structure: Trigonal (fibrous aggregate); Cleavage: None; Specific Gravity: 2.64-2.71

Hardness: 6
Color: Golden yellow to brown with silky chatoyancy
Luster: Silky/Vitreous

Identified May 13, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Golden yellow to brown with silky chatoyancy; Luster: Silky/Vitreous; Crystal Structure: Trigonal (fibrous aggregate); Cleavage: None; Specific Gravity: 2.64-2.71

Formation & geological history

Formed through the pseudomorphism of blue crocidolite (asbestos) into quartz. Iron within the mineral oxidizes to create the golden-brown color. Predominantly found in Precambrian iron formations.

Uses & applications

Extensively used in lapidary work for cabochons, beads, jewelry, and ornamental carvings. It is also popular in holistic and metaphysical practice.

Geological facts

The 'eye' effect, known as chatoyancy, is caused by light reflecting off the internal fibrous structure. If the stone is gray-blue, it is called Hawk's Eye; if red, it is often heat-treated and called Bull's Eye.

Field identification & locations

Identify by its distinct bands of color that shimmer or 'move' as you rotate the stone under light. Major deposits are found in South Africa, Western Australia, USA, and India.