There many ways to proportion a diamond for maximum brilliance. Within these rigid parameters to obtain optimal level of brilliance and/or that It indicates that while proportions such asįor an ideal cut diamond are important, it is not critical for a diamond to be

The findings of the GIA study are rather interesting. Shape stone and see how they play a role in determining their cut. As an example, it might be helpful to check these parameters for a Cut plays an important role in determining the brilliance ofĪ diamond. In the face-up position” and measures it in terms of Weight Light Return (WLR).Īfter many studies and models, the industry has come to someĬonsensus around the proportions of a diamond that will establish the qualityĬut. GIA refers to brilliance as “the intensity of the internalĪnd external reflections of white light to the eye from a diamond or other gem Otherwise, please use our simple guide instead. Please note that basic knowledge about diamonds is required to understand the substance of this article. As you might have heard by now, when it comes to diamonds, the cut of a diamond is critical in determining the overall brilliance of a diamond. Read our detailed guide for each shape prior to making a purchase.īrilliance is hailed as the ultimate factor in determining the overall beauty of a diamond. Moreover, it is okay for the proportions to be slightly high or low - GIA concluded that you can model these proportions slightly differently in order get the same level of brilliance (a tolerance of 0.2-0.3% up or down is okay).įollow the chart below for fancy cut stones. However, don't compromise overly on the other 3Cs in order to get the best proportions.

If you can obtain the above super ideal proportions without compromising on the other 3Cs, it would be an ideal scenario. While cut is absolutely critical, the brilliance of a diamond is about all 4Cs, not just cut. This is important information while reviewing two round diamonds that have received an equal excellent cut,Ĭlick hear to learn more about the importance of cut among the 4Cs. Please note that crown angle and pavilion depth playsĪ major role in picking a super ideal cut diamond from an ideal cut diamond.

Summary of Ideal Proportions in a DiamondĬompare These Proportions with 3D Video Technology Please note that GIA does not assign a cut grade to fancy cut stones such as princess cut or cushion cut yet, but still these proportions are critically important in analyzing the cut of fancy cut stones. In the first section, we will provide our best summarized insights on ideal proportions for round and non-round fancy shape diamonds. Ideal Cut Diamond Proportions and Brilliance

Diamond dimensions 1