Triple Excellent is the highest cut grade given by GIA laboratories. Remember, GIA's criteria for cut is not as stringent as that of AGS, so GIA Triple Ex diamonds are not considered for A CUT ABOVE. But they are included in Whiteflash's Premium Selection. Whiteflash personally reviews each diamond certified as GIA Triple Ex and filters out the ones they find unsatisfactory. This is a good place to buy a high-quality diamond at a good price.