Unearth a treasure trove of knowledge about the rocks and minerals beneath our feet--from their formation to collecting them. Make identification easy and accurate with this compact visual guide, packed with photographs and details on formation, distinguishing features, and much more. Over 600 high-quality photographs capture the unique characteristics, colors, and attributes of more than 500 rocks and minerals. Each specimen's entry includes annotated photographs to highlight the rock or mineral's distinguishing features, and concise details about its texture, origin, formation, and chemical composition to help identify it. Designed for beginners and experienced collectors alike, the introduction explains what rocks and minerals are, how they are classified, what equipment is needed for specimen collection, and how to start and organize a collection. Learn the differences between igneous, metamorphic, and sedimentary rocks, and refer to the glossary for many more technical and scientific terms.