by sledge » Sep 11, 2019 at 1:50 AM Like @lovedogs I put ZERO confidence in what BN, JA, etc define as an "ideal" cut. I actually get annoyed by it as it gives a potential customer false hope. Proportions may not tell us the whole story but mathematically you have to be within a certain range to make it work. As I noted above in more detail, it's my opinion the original BN stone falls short of those mathematical/geometrical bounds. So the first stone would be a hard pass for me. The 2.8 HCA confirms my thoughts.