Diamonds don't aren't just found perfect. Lasers cut the diamonds into those perfectly shaped diamonds at all of those jewelry stores. This site is all about how lasers shape diamonds. After they cut the diamond they put it through the bruting process (making the edge around the wide part), then polish it to get that nice smooth shiny look. Diamonds are  rated on the cut, clarity, carat and color. The lasers are used to cut and shape the diamond.