The heck with the feathers, I wouldln't buy that diamond becuase of the cut.
Good cut is more important to the beauty of a diamond's light performance than color or clarity.
Unfortunately GIA's industry-friendly cut grade of Excellent includes some proportions that are less excellent than others.
Of all the shapes round is easiest for finding a well cut diamond, using two tools, HCA and Idealscope.
Reject rounds that score over 2.0 on HCA and get Idealscope picture on those that score under 2.0.