This picture-packed, fact-filled guide will rock your world! Already selling more than one million copies, this comprehensive visual book for kids introduces the spectacular array of rocks and minerals on Earth. From volcanic rocks to glittering gems and everything in between, Eyewitness Rocks and Minerals leaves no stone unturned. Did you know that every rock is a combination of one or more minerals? Or that marble was first used in ancient Greece? And almost 20,000 meteorites land on our planet every year? Discover all this and much, much more inside. Part of DK's best-selling Eyewitness series, this book for children unearths essential information, fascinating facts, infographics, statistics, and timelines. With places to visit and ways to find out more, there is no end to your geological journey of discovery.