| http://www.w3.org/ns/prov#value | - A pleasure to peruse, ???Collecting Rocks, Gems and Minerals,??? written by Patti Polk, who has more than 20 years of rock collecting, cutting and polishing experience, is a beautiful, full-color guide that focuses primarily on the rocks and minerals that the majority of people are interested in for lapidary, jewelry or specimens for display.
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