In the "Reiki I and II Manual", Usui Reiki Ryoho, it is stated that, "The chakras are focused energetic life forces that exist within our body and auric field as swirling masses of energy. The chakras help to distribute energy for our physical, emotional, mental and spiritual functions. The seven major chakras correlate with the major nerve plexuses and are points of greater electromagnetic activity with the auric field."
Laying on of stones is a technique using crystals and gemstones placed on the body for healing. This methods works vey well with and compliments Reiki sessions. There are several purposes for using gemstones/crystals in Reiki sessions: Releasing and clearing negative energy, emotional healing, balancing and clearing the chakras (the bodies energy centers), and healing the aura. In this type of session, a gemstone is placed over each of the 7 major chakras in the body and the Reiki session takes place as normal, with the therapist's hands being placed directly over each gemstone/crystal.