Unlike others, I am really not an expert when it comes to diamond cutting, spec....etc. Therefore, I was wondering is any expert out there can please help me out there. My question is: why is a 1.78 ct. RB cut stone comes the size of 5.63 mmx5.96 mmx3.68 mm http://www.goodoldgold.com/diamond/4984/? Even my 0.71 ct. e-ring comes bigger than that....Am I wrong again? Can someone please explain this to me? Thanks in advance...