I'm looking for the optimal cut on a cushion diamond, but I can't find any info- just the other 3 c's. Help!!!

Well, that's because graders such as the GIA don't grade fancy cuts such as princess, cushion, ascher etc... Instead they note the table, depth, symmetry, ratio and girdle. The recommended table for a cushion is 53%- 65%, although in some cases it may slightly vary. The recommended depth would be about 65%- 58%. When choosing a girdle try to stick as much as possible to the medium range. An excellent ratio would be a 1x1.20x1, and a VG one would be 1.21x1.25x1.

It's probably a good idea not to skimp on color and clarity, because like most fancy cuts, it will be very visible.

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