mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Hardness: 7; Color: Yellow-brown to golden brown; Luster: Silky to vitreous; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71; Notable chatoyancy (cat-eye effect).

Hardness: 7
Color: Yellow-brown to golden brown
Luster: Silky to vitreous

Identified May 22, 2026More mineral →

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Physical properties

Hardness: 7; Color: Yellow-brown to golden brown; Luster: Silky to vitreous; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71; Notable chatoyancy (cat-eye effect).

Formation & geological history

Formed through the replacement of fibrous blue crocidolite asbestos by silica (quartz), a process known as pseudomorphism. It typically occurs in metamorphic environments through hydrothermal deposition.

Uses & applications

Primarily used in jewelry (cabochons, beads, rings), ornamental carvings, and as a popular semi-precious stone for gemstone collectors and metaphysical enthusiasts.

Geological facts

The unique shimmer, called chatoyancy, is caused by the reflection of light off the parallel mineral fibers within the stone. When the iron remains oxidized, it stays golden-brown; if heated, it can turn red (Red Tiger's Eye).

Field identification & locations

Identify in the field by its distinctive golden-yellow stripes and silky luster that seems to move when rotated. Found predominantly in South Africa, Australia, and parts of India and the USA.

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