For an oval cut diamond an ideal depth is less than 68 percent.
Ideal cut diamond dimensions.
If you can obtain the above super ideal proportions without compromising on the other 3cs it would be an ideal scenario.
In tolkowsky s initial publication he stated that the ideal cut diamond should only have a table proportion of 53.
If you are looking for a diamond that exhibits superior brilliance and sparkle scroll down to use my proven table of ideal cut diamond proportions instead.
For example this beautiful 1 01 carat oval cut diamond has a depth of 65 8.
For example see this excellent emerald cut diamond with a 64 6 depth.
Compared to round cut diamonds the prices of oval diamonds are generally 20 30 lower due to a better yield on rough cutting.
But the more a diamond is within super ideal cut proportions the better the light performance will be.
For an asscher or emerald cut diamond an ideal depth is between 61 to 68 percent.
While cut is absolutely critical the brilliance of a diamond is about all 4cs not just cut.
Nobody can agree on a set of numbers that will accommodate every cut and shape of stone.
Doing a search online for the ideal standards of princess cut diamonds you ll find a lot of controversy and confusion.
They strive to maintain carat weight and quality whenever possible.
The tolkowsky ideal cut.
They aren t exact because of the way diamond cutter s cut the stone.
So cut is often compromised.
Tolkowsky s standard for ideal cut diamonds called for a total depth of 59 3 with a table diameter of 53 and a crown angle of 34 5 degrees which is offset by a pavilion angle of 40 75 degrees however apparently he never accounted for the girdle edge of the diamond.
If a diamond is only slightly outside of super ideal cut proportions it will not matter that much.