Numerology is a divinatory practice based on the numerical analysis of a person's name, a date, etc.

Lithotherapy is a pseudoscience which claims to heal through crystals (rock crystal, amethyst, citrine, aquamarine, ruby, turquoise, etc.). Its promoters maintain that crystals naturally emit a singular “resonance” or “vibration” which would be capable of improving the well-being of the person in contact with or near it. This claim is not scientifically verified.