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 otherplacebo so it is generally considered to be pseudoscience.
Practitioners select the stones by colour or their believed metaphysical qualities and place them on parts of the body. Colour selection and placement of stones are done according to concepts of grounding, chakras or energy grids.
There is no scientific basis for the concepts of chakras, being blocked or energy grids requiring grounding being anything other than terms ascribed by the adherents to lend credibility to their practices. Energy as a scientific term is a very well-defined concept that is readily measurable and bears little resemblance to the esoteric concept of energy used by proponents of crystal healing.