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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.
One method is where the practitioner places crystals on different parts of the body, often corresponding to so-called "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.
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Practitioners select the colours of stones and place them on parts of the body. Stones are placed at the feet or held in the hands. Practitioners sometimes use crystal wands, which are placed near the receiver's 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 misleadingly 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.
Different cultures have developed traditions of crystal healing over time, including the Hopi Native Americans of Arizona and Hawaiian islanders, some of whom continued to use it as of 1997[update]. The Chinese have traditionally attributed healing powers to microcrystalline jade.
There is no peer reviewed scientific evidence that crystal healing has any effect. It is considered as a pseudoscience. Pleasant feelings or seeming successes of crystal healing can be attributed to the placebo effect, or to cognitive bias (which occurs when the believers want the practice to be true and see only things that back up that desire).
Crystal healing techniques are also practiced on animals, although some veterinary organizations, such as the British Veterinary Association, have warned that these methods are not scientifically proven and state that people should seek the advice of a vet before using alternative techniques.
As with other non-scientific methods the practice of "crystal healing" can be actively dangerous or possibly even fatal if it causes people with illnesses that are treatable by scientifically-based medicine to avoid or delay seeking effective treatment.
Rhinoceros horn had, like jade, healing properties.