mineral

Tiger's Eye

Silicon Dioxide (SiO2) with fibrous inclusions

AI-generated identification · may be incorrect

Hardness: 7 Mohs; Color: Golden-brown to yellow-gold; Luster: Silky; Crystal system: Trigonal (fibrous structure); Cleavage: None; Specific gravity: 2.64–2.71; Chatoyancy: Present (cat's eye effect).

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

Identified June 5, 2026More mineral →

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Physical properties

Formation & geological history

Formed when quartz replaces the fibrous mineral crocidolite (asbestiform blue-green mineral) through a process of pseudomorphism, typically found in metamorphic environments and Precambrian iron formations.

Uses & applications

Primarily used as a semi-precious gemstone in jewelry (cabochons, beads), decorative carvings, and as a popular collector's mineral for metaphysical purposes.

Geological facts

Tiger's Eye is known for its chatoyancy, an optical effect where light reflects off the parallel fibers inside the stone to resemble a feline's eye. It is the planetary stone for Gemini and the 9th anniversary gemstone.

Field identification & locations

Identify by its characteristic golden-brown undulating bands and silky sheen. Found commonly in South Africa, Australia, Burma, and India. When cut into cabochons, the chatoyant stripe should follow the length of the stone.