![]() With round cut diamonds, an Excellent cut can have a 5%-10% premium over the next grade, Very Good cut. The improvement of diamond manufacturing technology allows diamantaires to be more precise in cutting practices. Today, we see the highest number of Excellent cut or perfectly cut diamonds. Like the other diamond C's, Cut grade can have substantial implications on pricing. For example, an off center table facet may reduce diamond sparkle. If the location of a facet is incorrect, the performance of light and therefore the cut grade can be affected. Symmetry is simply the pattern and evenness of the size, shape and location of facets. If small striated polish lines remain, it may affect light performance and therefore, diamond cut. The polish of a diamond is how cleanly smooth the facet surfaces are. ![]() Moreover, polish and symmetry are a result of the manufacturing process. Brilliant cuts have a high degree of diamond sparkle and maximum the fire and scintillation of a diamond. They possess more facets than step cuts and the facets are triangular and kite-shaped. Good cut diamonds can be a good blend of value and size, however be careful and always ask a gemologist to assess the particular diamond for you before you make a decision.īrilliant cuts, most commonly Round cut diamonds or Princess cut diamonds, have maximum diamond sparkle. The top 25% of diamonds have a Good cut grade. Cutters may intentionally cut to Good proportions to achieve a particular look or style. These diamonds can have noticeably larger or even smaller measurements than perfectly cut diamonds of the same shape. Good cut diamonds have some light leakage, but overall shine bright. Good: Well cut diamonds that capture light and possess high degrees of sparkle. Avoid these diamonds as they will not make for sparkling jewelry. This cut category represents the top 35% of gem quality diamonds. Fair or Poor cut diamonds do not meet With Clarity’s minimum light performance criteria. These have little brilliance and are less visually appealing. These diamonds tend to leak noticeable amounts of light from being too deep or shallow in height. Fair & Poor: Diamonds with significant light leakage earn a Fair or Poor grade.
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