Where is Tiger's Eye found?
Tiger's Eye (variety of Chalcedony, a cryptocrystalline quartz)
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Open the appTiger's Eye occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Tiger's Eye
South Africa
The primary and most significant source of high-quality Tiger's Eye, particularly in the Griqualand West region of the Northern Cape Province. Deposits are found in banded iron formations.
Australia
Significant deposits are found in Western Australia, often associated with crocidolite-rich banded iron formations.
India
Smaller deposits are known, contributing to the global supply.
Myanmar (Burma)
Some occurrences have been reported.
United States
Limited occurrences, primarily in Arizona and California.
Canada
Minor deposits have been found.
Collecting tips
- Look for Chatoyancy. The most distinctive feature is the silky, moving band of light. This is best observed on polished surfaces, but can sometimes be seen on rough material with good lighting.
- Examine Color and Banding. Tiger's Eye typically displays golden-yellow to reddish-brown colors, often with parallel bands of varying shades. The presence of these colors and banding is a strong indicator.
- Check for Fibrous Structure. Even though it's cryptocrystalline, a close examination (sometimes with a loupe) might reveal the underlying fibrous structure that gives rise to the chatoyancy.
- Consider Geological Context. Tiger's Eye is found in specific geological settings, primarily in metamorphosed iron-rich rocks. Knowing the local geology can aid in identification.
- Hardness Test (Caution). While not recommended for valuable specimens, its Mohs hardness of 6.5-7 can help differentiate it from softer minerals. It will scratch glass but will not be scratched by a steel knife.
Quick Check
- Color:
- Golden-yellow to reddish-brown with characteristic banding.
- Luster:
- Silky to vitreous, with prominent chatoyancy.
- Streak:
- White (due to its quartz composition).
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