mineral

Tiger's Eye (Golden and Blue)

Silicon Dioxide (SiO2) with fibrous inclusions of Crocidolite

Hardness: 6.5–7; Color: Golden-yellow, brown, and blue-gray; Luster: Silky; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64–2.71

Hardness: 6
Color: Golden-yellow, brown, and blue-gray
Luster: Silky

Identified June 12, 2026More mineral →

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Physical properties

Hardness: 6.5–7; Color: Golden-yellow, brown, and blue-gray; Luster: Silky; Crystal structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 2.64–2.71

Formation & geological history

Formed through a pseudomorphic process where silica replaces fibrous crocidolite (asbestos) while maintaining the original fibrous structure. Blue areas (Hawk's Eye) represent incomplete silicification.

Uses & applications

Mostly used for lapidary purposes, jewelry (cabochons, beads), decorative carvings, and as a popular collector's stone.

Geological facts

The optical effect seen in this stone is called chatoyancy. Its name comes from its resemblance to the eye of a cat or tiger. When iron oxidation occurs, it turns golden; without oxidation, it remains blue.

Field identification & locations

Identified by its distinctive silky luster and parallel fibrous bands that shift light when moved. Major deposits are found in South Africa, Australia, and Namibia.

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