mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
AI-generated identification · may be incorrectHardness: 6.5-7 Mohs; Color: Golden-brown to yellow with chatoyant bands; Luster: Silky; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71
- Hardness
- 6
- Color
- Golden-brown to yellow with chatoyant bands
- Luster
- Silky
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Physical properties
Hardness: 6.5-7 Mohs; Color: Golden-brown to yellow with chatoyant bands; Luster: Silky; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71
Formation & geological history
Formed through the replacement of fibrous crocidolite (asbestos) by silica (quartz) while maintaining the original fibrous structure. It typically forms in metamorphic rock environments.
Uses & applications
Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collectible gemstone for its unique optical effect.
Geological facts
Tiger's Eye exhibits an optical phenomenon known as chatoyancy, which creates a 'cat's eye' effect when light reflects off the fibrous inclusions. It is considered a metamorphic 'pseudomorph'.
Field identification & locations
Identify by rotating the stone under light to observe the shimmering, moving bands. It is most commonly found in South Africa, Australia, and India. Small tumbled stones are very common in gift shops.
