Neither of these changes makes the diamond " appear " any larger, and both greatly reduce the sparkle of the diamond . ( A poorly cut diamond may have the same diameter and appear as large as a diamond . ) The " depth percentage " is the overall quickest indication of the quality of the cut of a round brilliant . " Ideal " round brilliant diamonds should not have a depth percentage greater than 62.5 %.
2.
Neither of these changes makes the diamond " appear " any larger, and both greatly reduce the sparkle of the diamond . ( A poorly cut diamond may have the same diameter and appear as large as a diamond . ) The " depth percentage " is the overall quickest indication of the quality of the cut of a round brilliant . " Ideal " round brilliant diamonds should not have a depth percentage greater than 62.5 %.