The ultimate introduction to rocks, minerals, and gemstones for kids - and grown-ups too! What are rocks? How do fossils form? Are rocks different across the world? 'The Rocks Book' has all the answers for curious readers, budding geologists - and petrologists! Learn about rocks from space, get tips on how to collect rocks sustainably, and discover an epic directory of rocks and minerals to help kids identify treasures found on rock hunting trips.