Get the perfect guide to rocks and minerals in the Great Lake StateWritten by Dan R. Lynch and Bob Lynch, Michigan Rocks & Minerals features comprehensive entries for 96 different types of common rocks and rare finds, including everything from Petoskey stone and copper to gold and agates. The easy-to-use format means youll quickly find what you need to know and where to look, while the authors photographs depict the detail needed for identification--no need to guess from line drawings. With this field guide in hand, identifying and collecting can be fun and informative.