The Crystal Gems—Garnet, Amethyst, and Pearl—are three of the toughest heroes on Earth. They are also mentors to Steven Universe, a Gem/human hybrid boy whose mother was a great Gem leader. This guide, told from Steven's point-of-view and written by the show's very own creator, Rebecca Sugar, is packed with facts about the Crystal Gems' powers, abilities, and origins. It also includes original art and a special introduction from Rebecca Sugar. This book is a must-have for any Steven Universe fan!
Guide to the Crystal Gems (Steven Universe) is a reference book by Rebecca Sugar which was released on October 6, 2015. It revealed information on the Crystal Gems in the show.