Based on the heatmap diamond cutters seem to prefer a depth range of 60 64 and a table range of 56 62.
Oval diamond table and depth.
For an oval cut diamond an ideal depth is less than 68 percent.
In order to end up with a beautiful oval diamond engagement ring it is important to make sure your jeweler understands optimum oval cut specifications.
The oval is considered a fancy shape.
For an asscher or emerald cut diamond an ideal depth is between 61 to 68 percent.
The accredited gem appraisers aga published ideal cut specifications for oval brilliant cut diamonds back in the 1980s.
Very good or excellent length to width ratio.
Brighter blue indicates more diamonds having that specific depth and table combination.
Below is a heatmap showing the counts of all depth and table combinations for oval diamonds available online at james allen and blue nile.
It is considered a classic oval cut diamond if its length to width ratio is 1 50 or in the approximate range of 1 36 1 60.
62 to 66 polish symmetry.
To recap here are my recommended guidelines for buying an oval cut diamond.
The depth of a diamond is its height in millimeters measured from the culet to the table.
For example see this excellent emerald cut diamond with a 64 6 depth.
Optimum table depth for oval diamonds.
Oval diamonds are not graded by the gia for cut quality.
A shorter one carat oval shape diamond with a length of 5 millimeters and a width of 4 6 millimeter with an equal depth percentage of 65 would have a deeper total depth of 2 9 millimeters.
The elongated design makes it appear larger than other shapes of the same carat weight.
Bursting with brilliance and fire an oval cut diamond is exquisite and unique.
Of all a diamond s 4 cs cut is the most complex and technically difficult to analyze.
For example this beautiful 1 01 carat oval cut diamond has a depth of 65 8.
In a grading report there are normally two measurements of depth the first is the actual depth measurement in millimeters shown under measurements at the top of a grading report and the second is the depth percentage see image above which shows how deep the diamond is in relation to.
G or better clarity.
For example an oval cut like this 1 01 carat diamond looks quite large in its yellow gold halo setting a 1 carat round diamond in a similar setting would look.
Diamond table and depth affect a diamond s overall cut grade.
54 to 58 depth.
Oval shape diamonds of shorter length and greater width display a smaller bow tie affect due to resulting steeper pavilion angles.
The oval cut diamond.
Table depth proportions of a diamond refer to the diagram of a diamond above to see where a diamond s table depth crown height and girdle thickness are measured.
Within a range of 1 30 to 1 35.
