Lasers have now been in use for many years to divide a diamond into pieces. The main advantage of this method is the flexibility in cutting directions. This is the only method in which grain is not a consideration. The laser burns through the diamond with intense focused heat. The only disadvantage is perhaps the slight additional weight loss in polishing away the burned surface.
Lasers are also used for drilling to access unsightly inclusions (as discussed earlier). The intense beam of light creates a tiny tunnel, through which a strong acid can reach the inclusion to lighten its color, or dissolve its impurity, thereby making it less noticeable.
Lasers can cut exotic diamond shapes such as a butterfly, a horse’s head or the state of Texas. They can also be used to create the cleft in a heart shape diamond.