Where is Tiger's Eye, Pearl, and Onyx found?
Quartz (Tiger's Eye), Calcium Carbonate (Pearl), Chalcedony (Onyx)
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Open the appTiger's Eye, Pearl, and Onyx 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, Pearl, and Onyx
Tiger's Eye
Major deposits are found in South Africa (Griqualand West), Australia (Pilbara region), India, Myanmar, Namibia, and the USA (California).
Pearl
Natural pearls are found in various marine and freshwater environments globally, with historical significance in the Persian Gulf, Red Sea, and waters around Japan, Australia, and the Philippines. Cultured pearls are produced worldwide, notably in Japan, China, Australia, and French Polynesia.
Onyx
Significant occurrences include Brazil, Uruguay, India, Madagascar, Mexico, Pakistan, and the USA (Arizona, California).
Collecting tips
- Tiger's Eye Identification. Look for the characteristic chatoyancy (cat's eye effect) and golden-brown to reddish-brown color. It often occurs in banded iron formations.
- Pearl Identification. Natural pearls are rare. Look for iridescence (orient), smooth surface, and a slightly gritty feel when rubbed against a tooth (for natural/cultured pearls, not imitations). Consider the environment: marine or freshwater mollusk habitats.
- Onyx Identification. Identify by its fine-grained, cryptocrystalline texture and characteristic banding (often black and white) or uniform black color. It can be found in volcanic areas or sedimentary layers.
- Safety for Tiger's Eye. While the crocidolite (asbestos) in Tiger's Eye is fully silicified and therefore not friable or hazardous in its finished form, raw or unpolished specimens, especially those showing blue crocidolite (Hawk's Eye), should be handled with care to avoid inhaling any potential dust if broken or abraded. Always wear appropriate respiratory protection when cutting or polishing any silica-bearing material.
Quick Check
- Color:
- Tiger's Eye: Golden-brown, red-brown. Pearl: White, cream, black, various iridescent hues. Onyx: Black, or black and white banded.
- Luster:
- Tiger's Eye: Silky, chatoyant. Pearl: Pearly. Onyx: Waxy to vitreous.
- Streak:
- Tiger's Eye: White. Pearl: White. Onyx: White.
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