What are metaphysical crystals? Metaphysical crystals are crystals that are believed to have healing or spiritual properties. These properties are often said to be associated with the different colors, shapes, and energies of the crystals. How do metaphysical crystals work? The exact way that metaphysical crystals work is not fully understood. However, some believe that the crystals emit vibrations that can interact with the human body and mind. These vibrations are said to be able to promote he