A jeweler once told me that the 4Cs does not always correlate with an ultra sparkling diamond. But, an ultra sparkling diamond does command top dollar for the diamond''s 4Cs price range. Is this correct? When my boyfriend went diamond shopping, he asked me what I wanted. I told him an ultra sparkly, round diamond and do not worry about the rest. I love my diamond...it sparkles in the shade, it reflects the blue sky, it makes rainbow prisms, it gets tons of compliments, it sparkles so much it looks bigger than what it is...yet, it is only graded as an SI1, with very good and good for symmetry and polish...and color F. Was the jeweler correct or am I naive when I look at the ring?