mineral
Tiger's Eye
Fibrous Quartz (SiO2) with iron inclusions
AI-generated identification · may be incorrectHardness: 7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal (fibrous habit); Cleavage: None; Specific Gravity: 2.64-2.71
- Hardness
- 7 Mohs
- Color
- Golden to red-brown
- Luster
- Silky
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Physical properties
Hardness: 7 Mohs; Color: Golden to red-brown; Luster: Silky; Crystal Structure: Trigonal (fibrous habit); Cleavage: None; Specific Gravity: 2.64-2.71
Formation & geological history
Formed when quartz replaces fibrous crocidolite (asbestos) in a process called pseudomorphism, commonly found in metamorphosed iron formations.
Uses & applications
Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular collector's mineral.
Geological facts
It displays a unique optical effect known as chatoyancy, where a silky band of light moves across the surface as the stone is rotated, resembling a cat's eye.
Field identification & locations
Identified by its distinctive golden-brown bands and chatoyant 'eye' effect. Large deposits are found in South Africa, Western Australia, and India.
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