"My Book of Rocks and Minerals is filled with fascinating facts about and amazing images of rocks, minerals, gems, and fossils from the deepest caves to outer space. Features introduce different categories, from crystals to glow-in-the-dark minerals, and illuminating images provide a closer look and show amazing geological formations. Kids can take their fascination even one step further and use the catalog and activity pages to help them collect and group rocks and discover how different rock types fit into the world around them."--Amazon.com.