- The Opal Association
All about opals, includes miners, cutters, wholesalers, retailers, exporters, collectors, hobbyists, lapidaries.
http://www.opal.asn.au
(Added: Mon Apr 10 2006 Rating: 0.00 Votes: 0)
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- The Rock Tumbling Hobby Site
Step by step guide, including tips on equipment and stone selection, preparation, and polishing.
http://www.rocktumblinghobby.com/
(Added: Fri Apr 07 2006 Rating: 0.00 Votes: 0)
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