The glittering shapes of gems and crystals, the strange glowing of phosphorescent rocks, these objects mesmerize young audiences. This volume of fascinating and accessible factoids introduces young readers to strange rocks and gems like tourmaline, which comes in every color and has been mistaken for other gems for centuries. It also explains the essential science concept of rock and gem formation in easy, age-appropriate language. Fantastic photographs compliment each fun fact, and a detailed graphic organizer provides a convenient summary of some of the coolest gems and rocks Earth has to offer.