After shopping at Fred to Tiffany - surprisingly I''ve finally found the perfect setting at Jared and a Leo cut was suggested by the staff and seemed to be exceptionally brilliant under the million dollar lights and in natural lights. I understand the 4 Cs but have no idea about these extra facet cuts...there also seems to be a bit of a premium, but then again that may be for the Jared lifetime insurance, replacement, cleaning - is the Leo/Jared combo a gimmick?!