mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Golden brown to yellowish brown, Luster: Silky/Vitreous, Structure: Trigonal/Fibrous, Cleavage: None, Specific Gravity: 2.64-2.71.

Hardness: 6

Identified April 16, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Golden brown to yellowish brown, Luster: Silky/Vitreous, Structure: Trigonal/Fibrous, Cleavage: None, Specific Gravity: 2.64-2.71.

Formation & geological history

Formed when quartz replaces fibrous crocidolite (blue asbestos) through a process of pseudomorphism, where the original shape of the fibers is preserved but the mineral composition is changed to silica. It is often found associated with iron formations.

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collectible gemstone due to its chatoyancy. Also used in spiritual or metaphysical practices.

Geological facts

Tiger's eye belongs to the chalcedony family. It exhibits a unique optical effect known as chatoyancy (cat's eye effect), where reflected light moves across the fibrous bands of the stone as it is turned.

Field identification & locations

Identify by its distinct golden-brown banding and silky luster. It is most commonly found in South Africa, Western Australia, India, and Burma. Collectors should look for high-contrast bands and a smooth, chatoyant polish.