for 75 rocks and minerals found in Minnesota, Wisconsin, and Michigan, from common rocks to rare finds. The authors know rocks and took their own incredible, full-color, sharp photographs to depict the detail needed for identification?no more guessing from line drawings. The entries are organized by area, so you can find rocks unique to each state or common to all three. With professional pictures and all the details you need to know?including what to look for and where to look for it?identifying and collecting is more fun and informative than ever!

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