Wiktionary
n. The supposed therapeutic effects of crystals.
Wikipedia
Crystal healing is a pseudoscientific alternative medicine technique that employs stones and crystals. Adherents of the technique claim that these have healing powers, although there is no scientific basis for this claim.
In one method, the practitioner places crystals on different parts of the body, often corresponding to chakras; or else the practitioner places crystals around the body in an attempt to construct an energy grid, which is purported to surround the client with healing energy. Despite this, scientific investigations have not validated claims that chakras or energy grids actually exist, nor is there any evidence that crystal healing has any greater effect upon the body than any other placebo so it is generally considered to be pseudoscience.
Usage examples of "crystal healing".
The witch who ran the Crystal Healing place was rumored to have spent ten doped-out years in the Haight between the failure of her marriage and her present life as Ginevra the Crystal Healer -- although you could hardly call her a girl.