Hello everyone. I have been researching here for a long time but have never before posted.
I have a specific opportunity through a family friend jeweler who just bought a stone back from a private buyer and is willing to sell it to me for not much more than what it cost him to buy it back. The stone is round and the size, color and clarity are all great by my standards. The issue is the cut. The stone's cut rating is only very good, but according to him it has GIA excellent proportions (table, angles, depth). I am told the reason it is rated very good is because symmetry is only "good" and the cut grade can only be, at most, one grade above the lowest grade of symmetry and polish. Supposedly if the symmetry were very good, it would have been graded excellent cut. The problem with the symmetry is that the variation in the stone's diameter is .13 mm. Incidentally, I checked on blue nile and did find stones of the exact same proportions with better symmetry that were graded excellent cut (table is 57%, depth is 62.3%, crown angle is 35 degrees and pavilion angle is 41.2 degrees).
Also, it's not a hearts and arrows stone but I can plainly see arrows when I look at it.
Does this explanation about the cut rating sound right, and does this kind of issue with the symmetry affect the sparkle and light reflection in a diamond like this?
Thanks.
I have a specific opportunity through a family friend jeweler who just bought a stone back from a private buyer and is willing to sell it to me for not much more than what it cost him to buy it back. The stone is round and the size, color and clarity are all great by my standards. The issue is the cut. The stone's cut rating is only very good, but according to him it has GIA excellent proportions (table, angles, depth). I am told the reason it is rated very good is because symmetry is only "good" and the cut grade can only be, at most, one grade above the lowest grade of symmetry and polish. Supposedly if the symmetry were very good, it would have been graded excellent cut. The problem with the symmetry is that the variation in the stone's diameter is .13 mm. Incidentally, I checked on blue nile and did find stones of the exact same proportions with better symmetry that were graded excellent cut (table is 57%, depth is 62.3%, crown angle is 35 degrees and pavilion angle is 41.2 degrees).
Also, it's not a hearts and arrows stone but I can plainly see arrows when I look at it.
Does this explanation about the cut rating sound right, and does this kind of issue with the symmetry affect the sparkle and light reflection in a diamond like this?
Thanks.