Diamond Information Table
The 'Table' of a diamond is the largest facet on the top. According to the American Gem Society (AGS) a table size of 53-58% of the total width is Ideal for round brilliant cut diamonds. The grading laboratories all have their own ideas on what the range for table percentage should be for a perfect Ideal cut, but most fall within the AGS perameters.
As the table size of a diamond changes, it significantly affects the brilliance and scintillation as well as altering the crown height/angle and the total depth of the diamond.
Marcel Tolkowsky was a pioneer in the world of diamonds, and was the first person to present a mathematical analysis of diamond cut. In 1919 he released the 'Diamond Design' , A study of the reflection and refraction of light in a diamond. He concluded that a diamond , having the most perfect fire and brilliance should have a single set of proportions. A diamond with no culet and an extremely thin girdle should have a 53% table, crown angle 34.5° , crown height 16.2% , pavillion angle 40.75° , pavillion depth 43.1% and an overall total depth of 59.3% . One must remember though that Tolkowsky's set of proportions will be different for any diamond that has a culet or a thicker girdle.
