Diamond Table Percentage

These percentages are helpful when you re working with diamonds of various carat sizes because you will be able to find the most ideal cut at any size essentially anything between 50 and 69 percent is considered alright. Table percentage is calculated by dividing the width of the table by the overall width of the diamond. I wouldn t consider a table range in isolation as table crown angle and pavilion angle all work together to specify a diamond s proportions.

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A 56 3 table and a 55 9 table are the same.

Diamond table percentage. They would both be rounded to 56 on a gia grading report. For example the ideal table for round cut diamonds is between 54 60 percent while the ideal dimensions for emerald cut diamonds puts table percentage between 66 72 percent. A larger table percentage does not necessarily equal a more brilliant diamond as there are multiple factors which dictate the final fire and brilliance of a diamond. An overly large table limits space at the crown area meaning the upper girdle and bezel facets have less surface area.

In addition to the depth percentage a diamond s table percentage is also important. The bezel facets of a diamond are where we observe the most fire. It is reported to the nearest whole percent 1. The table percentage of a round brilliant diamond is the average of four table measurements from bezel point to bezel point expressed as a percentage of the average girdle diameter.

The width of the diamond s table expressed as a percentage of its average diameter. Table percentage is calculated by measuring the width of the table as a percentage of the total width of the diamond. A component of the overall cut grade this measurement is critical to a diamond s light performance. The ideal table percentage will vary based on the shape of your diamond.

This happens because when diamond has a very high depth percentage most probably it will be too deep on the contrary very low depth makes the diamond shallow. In determining proportions one of the important factors is the size of the table facet. In a grading report table percentage is calculated based on the size of the table divided by the average girdle diameter of the diamond. A good table needs to be balanced it needs to be large enough to let lots of light into the stone but not so big that it doesn t refract light onto the crown of the diamond.

The table is the diamond s largest cut facet. Tables are measured in percentages. Diamond table depth play huge effect on a diamond cut and actually might change it some diamonds get lower higher cut grades based on the table depth percentage they have. So a 60 percent table means that the table is 60 percent as wide as the diamond s outline.

Dividing the width of the table by the overall width of the diamond you can find the table percentage. The table percentage is a calculated value obtained by the following formula. You can find ags 0 ideal proportions for all table sizes. However i prefer 55 60.

The facets are responsible for allowing light to enter and exit the gem.