Gemstone Information > Opals  Directory > Recreation > Hobbies > Rocks, Gems, and Minerals > Gemstones > Opals

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SITE LISTINGS Alphabetical  |  By Popularity 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. Opal Festival - Features a parade, mine safety demonstrations, competitions, heritage celebrations, and heaps of opals. Held annually at Coober Pedy, Australia.

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Directory > Recreation > Hobbies > Rocks, Gems, and Minerals > Gemstones > Opals

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