Tiger Eye
What it is
Tiger's eye is a chatoyant variety of quartz (silicon dioxide, SiO₂), famous for the shimmering golden-brown bands that seem to move across its surface as you turn it. It is fairly hard (about 7 on the Mohs scale), takes a good polish, and is tough enough for everyday jewelry.
How it forms
Tiger's eye began as crocidolite, a blue fibrous mineral. Over time, silica-rich fluids replaced the fibers with quartz while preserving their parallel structure, and iron oxidation turned the blue to gold and brown. The silky, light-reflecting fibers create chatoyancy, the "cat's eye" effect. It is best displayed in cabochons or polished beads, which show the effect at its strongest.
Where it comes from
The classic sources are South Africa (Northern Cape) and Western Australia. Other deposits include India, Namibia, Myanmar, Brazil, and the United States.
Varieties
- Golden or honey tiger's eye: The familiar gold-to-brown type.
- Red tiger's eye (ox-eye or bull's eye): Usually produced by heat-treating golden material, which turns the iron a deep red.
- Hawk's eye (falcon's eye): Blue-gray stone where the original crocidolite has not been fully replaced.
- Tiger iron: A banded combination of tiger's eye, red jasper, and hematite.
Cultural and metaphysical associations
- Ancient use: Roman soldiers reportedly carried tiger's eye as a protective talisman for courage in battle.
- Chinese culture: Known as 虎眼石 (hǔyǎnshí), it is popular in bracelets and beads and linked to protection and wealth luck. In feng shui it is often associated with the Earth element.
- Crystal healing traditions: It is commonly said to promote confidence, willpower, grounding, and clear decision-making. These are cultural and spiritual beliefs, not scientific claims.
