metamorphic

Tiger's Eye (Raw)

Pseudomorph of Quartz after Crocidolite (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown; Luster: Silky to dull (when raw); Crystal Structure: Trigonal/Fibrous; Chatoyancy (cat's eye effect) even in rough state.

Hardness: 6
Color: Golden to red-brown
Luster: Silky to dull (when raw)

Identified July 11, 2026More metamorphic →

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Physical properties

Hardness: 6.5-7.0 (Mohs); Color: Golden to red-brown; Luster: Silky to dull (when raw); Crystal Structure: Trigonal/Fibrous; Chatoyancy (cat's eye effect) even in rough state.

Formation & geological history

Formed through the pseudomorphism of blue crocidolite asbestos fibers by chalcedony quartz. Most deposits date back to the Precambrian era, formed in banded iron formations.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for metaphysical collectors.

Geological facts

Tiger's Eye is a classic example of pseudomorphism, where one mineral is replaced by another while retaining the original mineral's shape. The golden color comes from iron oxides within the fibers.

Field identification & locations

Identified by its golden-brown fibrous bands and silken luster. Commonly found in South Africa, Western Australia, India, and Myanmar. Look for distinct parallel fiber layers that shimmer when rotated.