metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
Hardness: 7 (Mohs scale); Color: Golden yellow to brown with chatoyant stripes; Luster: Silky to vitreous; Crystal Structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71
- Hardness
- 7 (Mohs scale)
- Color
- Golden yellow to brown with chatoyant stripes
- Luster
- Silky to vitreous
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 (Mohs scale); Color: Golden yellow to brown with chatoyant stripes; Luster: Silky to vitreous; Crystal Structure: Trigonal (fibrous texture); Cleavage: None; Specific Gravity: 2.64-2.71
Formation & geological history
Formed through a metamorphic process known as pseudomorphism, where silica-rich fluids replace the blue asbestos mineral crocidolite while retaining its original fibrous structure. Most deposits are approximately 2 billion years old.
Uses & applications
Predominantly used for lapidary purposes, including cabochons, beads, small carvings, and ornamental objects. It is a popular 'semi-precious' stone for jewelry and metaphysical collecting.
Geological facts
The unique shifting light effect is called chatoyancy. When the iron in the stone is oxidized to a lesser degree, it remains blue and is called 'Hawk's Eye.' Red Tiger's Eye is usually created by heat-treating the natural golden stone.
Field identification & locations
Identify in the field by its distinct golden-yellow fibrous bands and silky luster when tilted in the light. Major deposits are found in South Africa, Western Australia, and Namibia. Collectors look for high luster and well-defined parallel fibers.
More like this
