I am trading in my Fiance's diamond and am trying to stick to similar measurements on the stone(L/W). Her current stone measures 6.72 x 6.40mm and has a L/W ratio of 1.05. One of the stones Im considering is 6.75x 6.28 giving it a 1.07 ratio. Currently my Fiance thinks her current diamond looks perfectly square (I can see its slightly off square). She wants a square stone. Both are 1.50Qt. So my question is would such a small difference in measurement even be noticeable to the naked eye? It sounds to me like everyone agrees that a 1.05 looks square but a 1.07 is rectangular?? I have not seen the diamond yet...just going off the #'s for the question. I have already checked out the shape selector on Gemappraisers.