BK10 A Golden Guide of Rocks, Gems and Minerals by Herbert Zim and Paul Schaffer.  This is a revised and updated, full illustrated, authoritative, easy-to-use, handy identification guide to the most common kinds of rocks and minerals.  The book offers concise and fascinating information on physical and chemical properties, origins and geologic significance, gems and semiprecious stone and how to find and collect specimens.

A must have for any Rock Hound!