mineral
Tiger's Eye
Silicon Dioxide with Crocidolite (SiO2)
AI-generated identification · may be incorrectHardness: 7 Mohs; Color: golden to red-brown; Luster: silky; Crystal structure: hexagonal/trigonal; Cleavage: none; Specific gravity: 2.64-2.71; Notable for chatoyancy.
- 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: hexagonal/trigonal; Cleavage: none; Specific gravity: 2.64-2.71; Notable for chatoyancy.
Formation & geological history
Formed by the pseudomorphous replacement of blue crocidolite asbestos by silica, often found in metamorphic rock formations and iron-rich environments.
Uses & applications
Primarily used for jewelry, ornamental carvings, cabochons, and as a popular collector's gemstone due to its unique optical effects.
Geological facts
The 'chatoyant' or cat's-eye effect is caused by the parallel growth of quartz crystals and altered amphibole fibers. It is considered a stone of protection and good luck in various cultures.
Field identification & locations
Identified by its characteristic golden-yellow bands that shift light as the stone is rotated. Commonly found in South Africa, Western Australia, USA, and India.
