Mercury is a unique metal that exists in liquid form at ambient temperature and is associated with the planet of the same name. It’s a poisonous metal that’s linked to death, mystery, and transformation. It’s linked to scrying and divination. Mercury is also associated with physical and spiritual travel and movement. Ancient Romans, Greeks, Hindus, and Chinese were all familiar with the metal. It was regarded one of the three primary substances on Earth, along with salt and sulfur, by alchemists.