What are the three types of rock and how do they form? Where was the oldest fossil found? What are minerals used for? Why are gems so rare and expensive? Become a Rock Explorer and discover the answers to all those questions! From dinosaur fossils to sparkling new diamonds and rare minerals to the rocks we find on the ground, this book presents amazing facts about our natural world which will amaze and inspire. Split into four chapters: Rocks, Minerals, Fossils and Gems, and featuring simple, easy-to-understand text, this book is perfect for young explorers keen to understand the world around them.