mineral
Tiger's Eye (Inlaid in a band)
SiO2 (Silicon Dioxide with Crocidolite inclusions)
Hardness: 6.5–7 on Mohs scale; Color: Golden-brown with silky luster; Crystal structure: Trigonal/Fibrous; Cleavage: None (fracture is conchoidal); Chatoyancy (cat-eye effect).
- Hardness
- 6
- Color
- Golden-brown with silky luster
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Physical properties
Hardness: 6.5–7 on Mohs scale; Color: Golden-brown with silky luster; Crystal structure: Trigonal/Fibrous; Cleavage: None (fracture is conchoidal); Chatoyancy (cat-eye effect).
Formation & geological history
A metamorphic rock formed through the pseudomorphism of crocidolite (blue asbestos) by quartz. Iron within the stone is oxidized to create the distinctive golden-brown hue. Common in Precambrian formations.
Uses & applications
Primarily used in jewelry (beads, cabochons, ring inlays) and ornamental carvings. It is popular in the 'healing crystal' community and as a decorative stone in high-end accessories.
Geological facts
Tiger's Eye is famous for its chatoyancy, where light reflects off the fibrous structure to create a 'moving' band of light. Romans used to carry it into battle for protection, believing it helped them see through the 'eyes' of the enemy.
Field identification & locations
Identify by its unique silky banding and golden-brown stripes that shift when rotated in light (chatoyancy). Commonly found in South Africa, Western Australia, India, and Burma.
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