The princess diamond is the most popular shape after the round brilliant and is typically square in shape, although it can also be rectangular. The princess shape was created in the 1980s and displays the same high degree of brilliance as the round brilliant. It is a unique and distinctive alternative to the popular round brilliant. It's important to note that when weighing color grades and prices, sometimes a lower color grade diamond in a princess shape will manifest as visible color in the corners of the stone.
What is the ideal cut for a princess diamond?
Princess cut diamonds are the second most popular diamond for engagement rings after round brilliant diamonds, and are valued because of their terrific value and appearance. However, unlike round diamonds, the princess diamond lacks a standardized cut grading, so therefore the GIA or other diamond grading agencies will not grade the cut on a princess diamond.
So, how does one determine the ideal cut proportions for a princess diamond? Like with round brilliant diamonds, the ideal cut for a princess diamond is determined by many factors, most importantly depth and table proportions as well as crown and pavilion angles. The cut is also determined by the symmetrical arrangement of the facets on the diamond, which is simply put, how well all of the facets align with each other in a way that maximizes brilliance and fire.
So what are the ideal proportions of a princess cut diamond? It is our recommendation that for a princess diamond to have ideal proportions, its table must be within 62-68%, the depth must be 64-75% and the crown height should be 10-15%. The symmetry should also be very good to excellent.
Also, another important thing when determining the ideal cut for a princess diamond, it is crucial to take the width to length ratio into account, because this will decide how rectangular or square the diamond is. The ratio is calculated by dividing the length against the width. A perfect square princess diamond will have a ratio of 1, while a more rectangular one will be over 1.05.
When searching for the perfect princess cut diamond, it is always recommended to check with one of The Diamond Vault's certified gemologists who will be happy to suggest some excellent options for ideal princess diamonds.