People stop me all over the place and say my (K color diamond) has so much fire and brilliance. No one ever says it''s yellow even when I try to ask then to honestly tell me the truth. So it must be a great cut K. No jeweler has told me it''s as low as K. When I ask what they think it might be most say F thru I. So wouldn''t that indicate a very good cut? I have to say the gleams of sparkle and brilliance sometimes blinds me in the sun.