Get ready to be dazzled by some of the shiniest, most colorful, useful—and even dangerous—rocks, minerals, and gems on the planet! In this Level 3 reader, discover fascinating facts about the incredible rocks and minerals under our feet and deep in Earth's crust. Budding geologists will love reading about how rocks form, learning the names and features of the coolest rocks and minerals, and exploring rare and beautiful gemstones. Key features include: Expert-vetted text appropriate for ages 7 to 9 Brilliant and eye-catching National Geographic images 100 fun facts sprinkled throughout the book* A fact roundup at the end of each book for kids to review what they've learned Packed with weird-but-true facts and tons of cool info, this Level 3 reader explores the incredible world of geology.