This comprehensive encyclopedia presents in-depth information in a way that is engaging and accessible to young readers. Illustrated throughout with stunning photographs. This fascinating book is broken down into six chapters: Geology, Igneous Rocks, Sedimentary Rocks, Metamorphic Rocks, Fossils, and Crystals and Gemstones. Detailed factboxes summarise the key characteristics of each rock, fossil and gemstone. The Children's Encyclopedia series has been translated into 16 languages and sold over 715,000 copies worldwide!