metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Hardness: 6.5–7 on Mohs scale; Color: Golden-brown to yellow-gold; Luster: Silky; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific gravity: 2.64–2.71
- Hardness
- 6
- Color
- Golden-brown to yellow-gold
- Luster
- Silky
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5–7 on Mohs scale; Color: Golden-brown to yellow-gold; Luster: Silky; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific gravity: 2.64–2.71
Formation & geological history
Formed through the metamorphic process known as pseudomorphism, where quartz replaces fibrous crocidolite (blue asbestos) and is later oxidized by iron to create the golden-brown color. Found in metamorphic rocks often billions of years old.
Uses & applications
Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular semi-precious stone for collectors and metaphysical practitioners.
Geological facts
Tiger's Eye is famous for its chatoyancy, an optical effect that produces a vertical streak of light resembles a cat's eye. Historically, Roman soldiers wore it for protection in battle.
Field identification & locations
Identify by its distinct golden-brown horizontal banding and the 'moving' optical band of light (chatoyancy) when tilted. Major deposits are found in South Africa, Australia, and India. Collectors should look for vibrant contrast and chatoyancy.
More like this
