The stone is the remaining vestige of the diastrophism. The movement of the crust brought enormous energy from the earth's core so that the volcano emitted the hot liquid rock. When it became solid, the stone was formed. Therefore, the stone can be considered as an embodiment of the earth activity. After billions of years' rolling and eroding, the stone becomes round cobble and contains rich crystallite particles, which can release subtle energy that is helpful to the human body.