Well, we recommend a HCA score of 2.0 or less most of the time. This one may have missed excellent cut partially because of the thick girdle. Thick girdles can be a negative when weight is in that area which affects the face-up diameter. On the up side, twining wisps can be good inclusions in that some are pretty invisible to the eye. Have you seen the stone? If not, I would probably look a little further.