When the body is stressed, there is an alteration in the functioning of the whole system and this is like one instrument going slightly off-key creating disharmony. Bringing a crystal into the cacophony of vibrations is like striking a tuning fork.
One single, pure tone is emitted that can act as a guide by which members of the orchestra can re-tune their instruments and re-establish harmony.
Since crystals are, in fact, the simplest forms of matter, they may be seen to represent all possible combinations of energy and reflect the basic harmonies of nature.
Because any state of disharmony within the individual is caused by a natural imbalance, the introduction of the appropriate stones or crystals into the energy fields of the body can help restore this harmony.