metamorphic
Tiger's Eye (Golden)
Pseudomorph of Quartz after Crocidolite (SiO2)
Hardness: 6.5-7 (Mohs). Color: Golden yellow to brown. Luster: Silky. Crystal Structure: Trigonal (fibrous texture). Specific Gravity: 2.64-2.71. Distinctive chatoyancy effect (silk-like sheen).
- Hardness
- 6
- Color
- Golden yellow to brown
- Luster
- Silky
Identified More metamorphic →
Explore Tiger's Eye (Golden) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 (Mohs). Color: Golden yellow to brown. Luster: Silky. Crystal Structure: Trigonal (fibrous texture). Specific Gravity: 2.64-2.71. Distinctive chatoyancy effect (silk-like sheen).
Formation & geological history
Formed through the replacement of fibrous crocidolite (asbestos) by silica (quartz). It is a metamorphic process that occurs under heat and pressure, typically found in banded iron formations.
Uses & applications
Primarily used in jewelry for beads, cabochons, and carvings. Also used as a protective stone in spiritual practices and for ornamental desk accessories.
Geological facts
The 'cat's eye' effect, known as chatoyancy, is caused by the parallel reflection of light off the fibrous structure of the stone. While it starts as hazardous crocidolite, the replacement by quartz makes it safe to handle as a finished gem.
Field identification & locations
Identified by its distinctive golden bands that seem to move as the stone is rotated under light. Common locations include South Africa (Northern Cape) and Western Australia. In Singapore (1.3°N, 103.9°E), it is not naturally occurring and is exclusively an imported trade item.
More like this
