4.5 cm. As a result of the use of massage stones, stress and fatigue are removed, tone increases, the organism is cleansed and a state of harmony is achieved. Selenite promotes internal stability, cures mental illnesses, psychological problems and convulsions and thus strengthens the nervous system. Before the massage, we recommend warming the stones under a stream of warm water or in the sun. Aromatic oils can be used during the massage. After the massage, wash in running water.