All about crystals and gems Discovering treasures of the natural world

Gr 3--5--Each title offers two statements for readers to keep in mind as they explore the book to determine which is true. Along the way are photos of fossil hunters, time lines showing the use of minerals or crystals throughout history, and infographics of all sorts. Readers learn about tectonic plates, the impact of mining for ore, or famous jewels from around the world. "Think like a scientist" encourages readers to use maps, graphs, and charts to answer questions. Back matter offers hands-on activities, such as growing a stalactite or making your own fossils. There is also a final spread of featured facts and a page of "True Statistics." "Tools of the Trade," profiles of individuals from the field, and a Q&A with a NASA geologist add to the appeal. VERDICT An excellent way to update or expand collections and sure to please geology enthusiasts.