The round cut diamond is by far the most popular and chosen shape. About 90 percent of the engagement rings we sell have this cut. And that is of course not without reason. Over the past 100 years, diamond cutters have used the most advanced techniques in light and mathematical calculation to achieve the best 'fire' and 'life' in a diamond. The well-known “brilliant cut” is the result. In addition, a brilliant cut diamond offers the most options when it comes to a balance between cut shape, color and clarity level, while still giving you the fire and life you want. To optimize the brilliance of a traditional round diamond, preferably choose a diamond with a cut quality of at least Good and preferably Very Good or even Excellent.