Pocket Nature Guide- Rocks and Mineralsis a practical, concise field guide to the world's rocks and minerals, packed with stunning photography and expert information. The 325 most commonly encountered species are given full or half-page coverage. Each entry includes a large, character full photographic image, supporting photographic images to show important variations, and a data panel to consistently summarize key facts. A simple text profile picks out the most useful details to aid identification and provides interesting background information.