priests and spiritual seekers
... have used crystals for their special powers since the time of Tutankhamen. Modern crystal healing is based on traditional concepts borrowed from Asian cultures, most notably the Chinese concept of life-energy (chi or qi) and the Hindu or Buddhist concept of chakras, which are vortices of this life-energy, that connect the physical and supernatural elements of the body.
Chi flows through the physical body through pathways called chakras, meridians and nadis. It also reaches out beyond the body in an auric field. This life force is what nourishes and supports the vital functions of the body. Chi (life force) can be disrupted due to negative thoughts and feelings such as stress.