mineral

Tiger's Eye

Pseudomorph of Macrocrystalline Quartz after Crocidolite (SiO2)

Hardness: 7 on Mohs scale; Color: Golden-yellow to brown (iron-rich) with possible blue/green tones; Luster: Silky; Crystal structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71

Hardness: 7 on Mohs scale
Luster: Silky

Identified May 2, 2026More mineral →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through a pseudomorphic process where silica (quartz) replaces the fibrous mineral crocidolite (blue asbestos) while retaining the fibrous structure. The chatoyancy (cat-eye effect) is caused by the light reflecting off these embedded fibers.

Uses & applications

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

Geological facts

Tiger's Eye is a classic example of a pseudomorph. If the original blue crocidolite is not fully oxidized to yellow/brown by iron, it is known as Hawk's Eye (blue) instead of Tiger's Eye.

Field identification & locations

Identify in the field by its distinct chatoyancy (the shimmering band of light that moves as the stone is turned) and fibrous bands. Commonly found in South Africa, Australia, and Brazil.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral