A complete guide to diamond cuts and how a diamond's cut will have a dramatic impact on your diamonds' brilliance, sparkle, scintillation and overall appearance.
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There is no doubt about the importance of diamond cuts when judging the beauty of your diamond. Brilliance, scintillation, Fire and sparkle are all a direct result of how well a diamond is cut. Ideal cut diamonds will sparkle more than Very Good (VG) cut diamonds. Diamonds with Good, Fair or poor cut are not good options if you want your diamond to sparkle.
There is also a rule that is called the "60/60" rule that simply means you want your depth and table to be as close to 60% as possible. A diamond that meets the 60/60 rule, has excellent symmetry, excellent, polish and an "Excellent Cut Grade", will spsarkle to it's fullest potential...guaranteed. To learn more about diamond cuts, visit this page. It's a great article
An important note: A diamond that has a very poor clarity grade, ie: large number of inclusions (imperfections), can have a negative impact on the sparkle of the diamond. This does not mean that you have to buy a flawless diamond or even a VVS clarity diamond, but you should consider buying a SI1 or VS2. That way the inclusions will be small enough so as to not negatively impact the diamond's potential brilliance, fire and scintillation.