Princess cut diamond lw ratios.
Table percentage princess cut diamond.
The table percentage is calculated by dividing the width of the the table by the width of the stone as measured along the girdle.
We ve reduced the range to 71 75 depth and 68 72 table.
Thin 1 0 medium 3 0 thick 4 0 etc or described using words such as medium thick or thin.
For instance a princess cut with a 74 or 76 percent depth would still be considered acceptable and can yield an attractive diamond.
In a grading report the finish of the girdle will also be stated and listed as one of the following.
Polished faceted or bruted.
This proportion is used in calculating certain percentages such as table size total depth crown height and pavilion depth.
A very good cut can be between 56 to 67 percent or 75 to 76 percent.
Diamonds with tables in the 75 80 or 56 60 range are also considered well cut.
A rule to follow when choosing a princess cut diamond is to avoid those with a table percentage that is greater than the depth percentage.
This thickness is measured as a percentage of the diameter e g.
Follow our chart below carefully for a thorough examination.
For a princess cut diamond an ideal table takes up 68 to 74 percent of the width of the diamond see this example of a stunning 0 90 carat ideal cut princess diamond with a table of 71.
A small minority of diamond dealers prefer a princess with a very small table under 68.
Since gia does not assign a cut grade to princess cut diamonds you must have a basic idea of what ideal proportions are for a princess cut diamond in order to make an informed decision.
However the corner to corner measure of a princess cut is typically 15 greater than the diameter of a same weight round diamond creating the illusion of greater size.
Keeping the table to 75 and below will help you find a great princess.
If you prefer small tables prepare to do some searching as these are less common than larger tables.
Carat for carat the crown surface area of a princess cut is about 10 less than a same weight round diamond.
Ideally a depth of 62 74 and a table of 58 70 is preferred.
A table percentage of 60 75 is considered best for a princess cut.
A very good cut can have the table of 52 to 53 percent or 58 to 60 percent.
In practice depth 75 and high crown heights for diamonds with table 68 sacrifice too much spread the diamond will have smaller than average side lengths in mm.
The total depth percentage of a round brilliant diamond is the table to culet depth expressed as a percentage of the average girdle diameter and reported to the nearest tenth of a percent 0 1.
