The Philosopher's Stone is an alchemical blue moonstone gem with phenomenal magic and one of many objects featured in the episode "The Book of Khartoum" of the Aladdin TV series . The evil wizard Khartoum is trapped in his cursed book. His only hope of release is a magical gem called the Philosopher's Stone which contains the power of the cosmos. All he needs is someone greedy enough to create the stone and release him from his prison. As it turns out, Mozenrath is that "someone" when he finds the book.