Crystallomancy is the art of divination that uses crystals to predict future events. If you're looking for other words or phrases that mean the same thing, you might consider gemstone divination, crystal gazing, or crystal vision. These terms all refer to the same basic practice, which involves using a crystal or gemstone as a tool for scrying or fortune-telling. Some other related terms you might encounter include lithomancy (which refers specifically to divination with stones) or scrying (which can refer to divination with any reflective surface, including crystals). Whatever term you use, these practices all rely on the idea that crystals have a special power to reveal hidden truths and help us uncover the mysteries of the future.