metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal/Fibrous; Cleavage: None; Specific Gravity: 2.64-2.71

Hardness: 6
Color: Golden to red-brown
Luster: Silky

Identified May 25, 2026More metamorphic →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Golden to red-brown; Luster: Silky; Crystal structure: Trigonal/Fibrous; Cleavage: None; Specific Gravity: 2.64-2.71

Formation & geological history

Formed through the replacement of fibrous blue crocidolite asbestos by silica (quartz) while retaining the fibrous structure, resulting in chatoyancy. They are typically Precambrian in age.

Uses & applications

Extensively used in jewelry (cabochons, beads), decorative carvings, and as a popular semi-precious stone for metaphysical collecting.

Geological facts

The name 'Tiger's Eye' comes from its resemblance to the eye of a tiger or cat. When it is blue-grey, it is known as Hawk's Eye. It is a classic example of a pseudomorph.

Field identification & locations

Identify by its distinctive silky luster and bands of chatoyancy that 'shimmer' as the stone is turned. It is primarily mined in South Africa and Western Australia.