Note: For super-ideal diamonds such as Brian Gavin Diamond Signature Hearts and Arrows and Whiteflash A Cut Above, the steepest/deepest combination that does not compromise light performance is 34.8°/40.9°. Girdle Thickness: Thin to medium (2.5 – 3% preferred) It turns out that there is actually a range of proportions that can be considered to have the top light performance characteristics identified by Tolkowsky.īased on the TIC range of proportions, my recommended set of proportions for balanced light performance are: In that tutorial, I introduced the Tolkowsky Ideal-cut (TIC) set of proportions that Marcel Tolkowsky believed produced the optimum light performance for a round brilliant diamond. If you need a little refresher on diamond cut, just take 5 minutes and go over that basic tutorial again.
#IDEAL DIAMOND DIMENSIONS HOW TO#
In this tutorial I am going to show you how to pick a round diamond, prosumer style.
It can quickly get confusing not to mention that it’s very time consuming to go through every available diamond trying to find one that is perfect. Have you ever tried to search for a diamond using only the basic 4Cs? Well then you’ll know that what you end up with is a long list of diamonds that all look very similar at first.