If the cut is too shallow, light escapes through the pavilion before it can be reflected. Because of the great volume of diamonds that Bellman's purchases, we enjoy the unique benefit of working directly with the diamond cutters. This allows us to select only the best ensuring that the diamonds we sell are cut to their maximum brilliance. A colorless diamond is considered the best and has the highest value. They are most certainly inferior diamonds and not a good buy.
Most diamonds contain very tiny natural birthmarks known as inclusions.
The fewer and smaller the inclusions are, the more valuable the diamond. In fact, a diamond that is totally free of both inclusions and surface blemishes is very rare. If this happens to you, insist to view the stone under their microscope. If the jeweler refuses, find another jeweler who will accommodate you. It takes many years of viewing diamonds through a loop for even an experienced jeweler to properly identify these inclusions.