mineral
Tiger's Eye
Silicon Dioxide with Crocidolite inclusions (SiO2)
Hardness: 7 on the Mohs scale; Color: Golden brown, yellow-brown, with bands of chatoyancy; Luster: Silky to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None
- Hardness
- 7 on the Mohs scale
- Color
- Golden brown, yellow-brown, with bands of chatoyancy
- Luster
- Silky to vitreous
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Physical properties
Hardness: 7 on the Mohs scale; Color: Golden brown, yellow-brown, with bands of chatoyancy; Luster: Silky to vitreous; Crystal Structure: Trigonal (microcrystalline quartz); Cleavage: None
Formation & geological history
Formed when quartz pseudomorphs itself over crocidolite (asbestos) fibers, replacing them while retaining their fibrous structure; commonly found in metamorphic rocks.
Uses & applications
Used primarily for gemstones, cabochons, beads, ornamental carvings, and in metaphysical practices.
Geological facts
Tiger's eye exhibits a optical phenomenon called chatoyancy (cat's eye effect), which is caused by the parallel intergrowth of quartz crystals and altered amphibole fibers.
Field identification & locations
Easily identified by its distinctive golden-brown stripes and silky moving band of light when rotated. Found mainly in South Africa, Australia, India, and the USA.
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