National Audubon Society Field Guide to Rocks and Minerals
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Smithsonian Handbooks
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Rockhounding Oregon
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Rockhounding Washington
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Amateur Gemstone Faceting Volume 1
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Rockhounding Colorado
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Rockhounding New York
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Rockhounding Pennsylvania and New Jersey
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Rockhounding New England
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Colorado Rockhounding
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Gem Trails of Southern California
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Gem Trails of Northern California
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