metamorphic

Tiger's Eye and Gemstone Assortment

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

AI-generated identification · may be incorrect

Hardness 7.0 (Mohs), colors include golden yellow, brown, and deep orange. Exhibit silky luster and chatoyancy (cat-eye effect). Most are cryptocrystalline quartz structures.

Identified July 8, 2026More metamorphic →

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Physical properties

Hardness 7.0 (Mohs), colors include golden yellow, brown, and deep orange. Exhibit silky luster and chatoyancy (cat-eye effect). Most are cryptocrystalline quartz structures.

Formation & geological history

Formed through the replacement of fibrous blue crocidolite asbestos by silica, maintaining the fibrous structure. Primarily found in Precambrian iron formations.

Uses & applications

Used extensively in jewelry, ornamental carvings, pocket stones, and decorative cabochons.

Geological facts

Tiger's Eye is a classic example of a pseudomorph. If the material is blue, it is known as Hawk's Eye; if it is heated or naturally altered, it can turn red.

Field identification & locations

Identify by moving the stone under a light source to see the shifting bands of light (chatoyancy). Common in South Africa, Australia, and Namibia. Popular for beginner collectors.