mineral

Tiger's Eye

SiO2 (Silicon Dioxide) with fibrous crocidolite inclusions

Hardness: 7 Mohs; Color: Golden yellow to deep brown/black; Luster: Silky; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71; Chatoyancy: Distinct silky band of light

Hardness: 7 Mohs
Color: Golden yellow to deep brown/black
Luster: Silky

Identified June 3, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Golden yellow to deep brown/black; Luster: Silky; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71; Chatoyancy: Distinct silky band of light

Formation & geological history

Formed through the pseudomorphous replacement of blue crocidolite asbestos by silica, maintaining the fibrous structure while turning into quartz. Commonly found in metamorphic rocks.

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collector's gemstone due to its chatoyance.

Geological facts

Famous for the 'chatoyant' effect which makes the stone appear to have cat-eye-like bands of light; it is a member of the chalcedony family.

Field identification & locations

Identify by its unique silky banding and golden-brown stripes that shift when moved in light. Found heavily in South Africa and Australia. Collectors should look for high-contrast bands and a smooth polish.

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