A diamond cut to optimal proportions, with optimal polish and symmetry, and the most weight loss to produce maximum luster, brilliance, dispersion, and scintillation. Diamonds cut to this standard are the most valuable, with only 5% of the round brilliant diamonds on the market cut to this standard.
A specific set of proportions discovered by Marcel Tolkowsky in 1919 thought to produce the greatest brilliance and maximum dispersion in a round brilliant cut diamond.
An ideal cut diamond has the best combination of angles that allow light to enter the diamond and be reflected back, to create the best combination and brilliance and fire. Ideal cuts often create perfectly aligned arrows and heart patterns that can be seen under magnification.
a precise degree of proportions that profoundly influence the sparkle, fire and brilliance of a diamond
a specific set of guidelines that delineate the proportions that give a diamond the highest amount of fire and brilliance
A perfectly proportioned round diamond
A diamond cut to utmost precision to maximize brilliance and fire. In 1919, Marcel Tolkowsky calculated a set of measurements that would produce a Round Brilliant cut diamond with the best balance of Brilliance, Dispersion and Scintillation. The AGS now defines an Ideal Cut Diamond, as any diamond which has cut proportions close to that of the Tolkowsky's Ideal Cut.
"Ideal" also known as the "American Ideal Cut", a cutting style that is based on the Tolkowsky theoretical brilliant cut diamond.
