Gemstones and snowflakes represent some of our most memorable and alluring interactions with crystals, but crystals form many different materials, come in various shapes, sizes, and colors, and can grow in several different ways. This inviting volume examines the science behind crystal formation, clearly explaining to an elementary audience the difference between the types of bonds that hold crystals together and elucidating the melting, freezing, and dissolution processes that yield crystalline structures. Readers are also guided through the process of growing their own crystals at home. Vocabulary, Think About It, and Compare and Contrast boxes round out the engaging narrative.