I would like opinions regarding a stone that I am considering purchasing from Blue Nile. It is GIA, .84 carat, F color, SI1 clarity, excellent cut, polish, & symmetry. Fluorescence none. Measures 6.06 - 6.11 x 3.73. Table is 56% and depth is 61.3%. Crown angle is 34.5 and pav. angle is 40.8, Culet is none. Girdle is thin to med faceted (3.0%). I have not seen the stone, but since it''s SI1, would expect NOT to be able to see imperfections with naked eye. Am I safe in assuming that? The diagram shows a cloud, and a crystal very close together and the crystal is what scares me. The cost is $2900. Any help is appreciated!