Collecting Rocks, Gems and MineralsBy: Patti Polk This revised and expanded guide is a rockhound's must have resource Easy to use and lavishly illustrated, this edition of Collecting Rocks, Gems, and Minerals serves as an introduction for beginners while also including valuable technical information for seasoned collectors. This guide takes you from novice to knowledgeable enthusiast in no time and features: An easy to use, quick reference format arranged by category and color of stone