Fossils, Geology, Rocks & Minerals, Conservation, Environmentalism 

What are the key classifications of rocks and minerals. What determines the value of a gemstone? How are rocks and minerals identified? Rocks & Minerals, an Explore Your World ™ handbook, answers these and other questions, providing a captivating blend of information and entertainment about one of the world's most popular hobbies.Incorporating the Discovery Channel's unique, authoritative approach and acclaimed visuals, Rocks and Minerals goes beyond traditional guides by combining field identification techniques with fascinating background information and practical hands-on advice. Organized in a clear, accessible style, beautifully illustrated with more than 300-full color photographs and illustrations, and packed with the most up-to-date information by mineralogists and geologists, this comprehensive handbook offers a wealth of information in a single portable source.Rocks & Minerals is divided into three main sections:"Realm of Rocks" provides background information to help collectors acquire a strong base of knowledge--including an overview of geology and discussion on the earth's crust, rock composition, plate tectonics, and volcanoes."Mineral Kingdom" explains the structure and composition of minerals, explores the technology involved in underground and ocean mining, and describes the fine art of cutting gemstones."Collector's Wisdom" contains practical advice for the hobbyist on acquiring the tools needed to gather specimens, classifying and testing samples, and finding the best rock and mineral sources. Identification guides detail information on origin, chemical composition, and such identifying characteristics as color, streak, luster, hardness and specific gravity for more than 150 rocks and minerals.Rocks & Minerals is sure to delight, teach and entertain rock and mineral enthusiasts, and reveal our wondrous world as never before. - from Amzon