Gemstone Information > Opals

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(AU) Opal Festival - Features a parade, mine safety demonstrations, competitions, heritage celebrations, and heaps of opals. Held annually at Coober Pedy, Australia.
Australian Opals & Outback Australia - Opal mining, opal photos, and the Opal Festival at Yowah.
Gemstone Education: Opal - History of the stone that has a rainbow locked within.
Gemstones: Opal - An essay from the U.S. Geological Survey.
Opal (Hydrated Silica Glass) - Offers detailed physical description, images of specimens, and more.

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