gemstone
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Hardness: 6.5-7.0 (Mohs); Color: Golden yellow to brown; Luster: Silky; Structure: Trigonal/Fibrous; Chatoyancy (cat-eye effect); Specific Gravity: 2.64-2.71
- Hardness
- 6
- Color
- Golden yellow to brown
- Luster
- Silky
Identified More gemstone →
Explore Tiger's Eye in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7.0 (Mohs); Color: Golden yellow to brown; Luster: Silky; Structure: Trigonal/Fibrous; Chatoyancy (cat-eye effect); Specific Gravity: 2.64-2.71
Formation & geological history
Formed when the mineral crocidolite is replaced by silica (quartz) while retaining its fibrous structure. It is considered a metamorphic rock product often found in iron formations.
Uses & applications
Primarily used for pendants, rings, beads, and carved decorative objects. Also valued in gemstone healing circles and as a popular collector's mineral.
Geological facts
The optical effect known as chatoyancy is caused by the reflection of light from the parallel fibers within the stone. In its blue, unoxidized state, it is known as Hawk's Eye.
Field identification & locations
Identifiable by its distinct move-able golden shimmer when rotated. Commonly found in South Africa, Western Australia, India, and Namibia.
More like this
Other gemstone specimens
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone
Black Opal Ring (Carved Opal)
Hydrated Silicon Dioxide (SiO2·nH2O)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (or possibly Diamond)
Zirconium dioxide (or Carbon)
gemstone