This amazing book welcomes you to Earth's fascinating rocks, minerals, and gems, from igneous rocks formed deep inside the Earth's molten core to sparkling emeralds. Stunning pictures and fast facts will allow you to grasp a wealth of knowledge in a fun way. The pure form of every rock or mineral is shown via an eye-catching image, surrounded by quiz questions. Turn the page to find the answers. In no time, you'll be able to distinguish sedimentary from sandstone, metamorphic from mudstone, and pyrite from pearl. Discover the unique qualities of each material, together with how it is used in industry, architecture, art, and science. You can use the book to test your own knowledge, or challenge your friends and family. This book is packed with information on the world's amazing materials - from rainbow rocks and priceless diamonds to minerals that glow in the dark!