Rocks, Gems, and Minerals 4/e Economic systems & structures drawing on the examples of

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Rocks, Gems, and Minerals 4/e Economic systems & structures drawing on the examples ofRocks, Gems, and Minerals is a field guide to more than 100 of the most common and sought after rocks, gems, and minerals hidden throughout North America. Conveniently sized to fit in your pocket and featuring full color, detailed photographs, this informative guide makes it easy to identify rocks in your backyard and beyond. Also included is an introduction that covers fundamental geology information and interesting facts. This is the essential