mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Hardness: 7 Mohs; Color: Golden yellow to brown; Luster: Silky; Crystal structure: Trigonal (fibrous texture); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.71

Hardness: 7 Mohs
Color: Golden yellow to brown
Luster: Silky

Identified May 3, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Golden yellow to brown; Luster: Silky; Crystal structure: Trigonal (fibrous texture); Cleavage: None (conchoidal fracture); Specific Gravity: 2.64-2.71

Formation & geological history

Formed when silica-rich fluids replace the blue asbestos mineral crocidolite through a process called pseudomorphism, retaining the fibrous structure. Primarily formed in Precambrian iron formations.

Uses & applications

Widely used for cabochon jewelry, beads, ornamental carvings, and as a popular collector specimen due to its unique optical effect.

Geological facts

Tiger's Eye exhibits chatoyancy, the 'cat's eye' effect, which occurs when light reflects off the parallel fibers of the mineral inside the quartz. A blue variety is known as 'Hawk's Eye'.

Field identification & locations

Identify by rotating the stone in light to see the shimmering bands move (chatoyancy). It is commonly found in South Africa, Western Australia, Myanmar, and Namibia. Collectors look for high luster and distinct color banding.

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