Richard M. Pearl

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Colorado Gem Trails: And Mineral Guide

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GEMS, MINERALS, CRYSTALS AND ORES The Collector's E …

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1001 Questions Answered About Earth Science

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Cleaning and preserving minerals

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Fallen from Heaven: Meteorites and Man

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Geology (College Outline Series)

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How to Know Minerals and Rocks

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Rocks and Minerals

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Turquiose

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1001 Questions Answered About the Mineral Kingdom