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Start at the intersection of the cutter's and anti-cutter's line (34.5, 40.7). If you want to go up in pavilion angle to 41.2 (+0.5), you'd have to reduce the crown angle down to 32-33 (-2.5) to compensate for the higher pavilion angle. The diamonds below have 32-33 and 41.2 proportions and will look similar to a 34-35, 40.6-41.
In general the following proportions will provide the best light return. For round brilliant cut, as you get closer to the "ideal" there will be more fire and brilliance: Table: 57 to 58%->ideal 58 Depth: 61 to 62.5% ->ideal 62 Crown angle: 34 to 35-> ideal 35 Pavillion angle: 40.6 to 41 ->ideal 41
I recommend diamonds with proportions that sit in the intersection of GIA EX/AGS 0 Ideal and show nice optical symmetry. That's what's shown in my cut estimator with visual examples of each proportion combination.
18 Δεκ 2023 · Crown angle: Angle of the crown from top of the girdle to edge of a diamond crown; Ideal Cut Diamond Proportions. The best diamond proportions allow light to refract and reflect back to your eyes. The ideal round diamond proportions are listed in the table below and based on expert recommendations.
14 Νοε 2023 · Round Brilliant Diamonds: The round brilliant cut diamond is the most popular and timeless diamond shape. It boasts 58 facets, which maximize its light return and sparkle. The ideal proportions for a round brilliant diamond include a table percentage of 53-58%, a depth percentage of 59-63%, and a pavilion angle of 40.6-41 degrees.
More importantly, ideal round cut diamonds provide a maximum light return compared to other shapes. The proportions of a well-cut round with its 57 facets allow for nearly 100 % light return. You can see it quite easily if you compare the ASET images of perfect round and princess cut diamonds.
Beyond4Cs.com’s Ideal Cut Proportions for Round Diamonds. Now, with all the technical specifications laid out, you might assume that all the diamonds in the market should be polished to ideal proportions if cutters simply followed a standard formula. However, the truth is far from that.
