The main purpose of faceted crystal balls is to transmute energy. The balls must be faceted and the size depends upon the size of the ailment you are trying to cure. When "Sha" or hard energy enters the ball, the facets deflect the energy breaking it up and turning it into "Chi" or soft energy. Crystal Balls are typically used in windows to transmute the "Sha" entering your home from the street. They can also be used in an entryway or long hallway to slow down the energy. The size of the crystal ball you choose is dependent on the size of the ailment and the amount of energy you are trying to transmute.