Princess Cut Diamonds

Princess cut diamonds are the second most popular shape behind round diamonds. Princess cuts have a square (sometimes rectangular) shape with pointed corners and many small facets (up to 76). It is a brilliant cut. On a GIA report, you’ll see it called a square modified brilliant. Princess cuts originated in the United States and while they have more depth than the round cut diamonds, their faceting reduces the visibility of inclusions. To learn more about princess cut history, origin and popularity.

The classic look of a princess cut diamond is what has caused it to maintain its popularity throughout the years. The popularity of this cut is not restricted to only diamond rings, but is versatile enough to be used in several different settings. Bracelets, necklaces, or earrings are all popular settings for the princess cut diamond. The princess diamond is one of the most popular diamonds that is used for engagement rings. The princess cut is square shaped with four sharp corners. The shape from the side is a pyramid that is inverted but the fontal view is that of a square.

It is a common belief that the princess diamond history goes way back to the 1970s, when a new shape, the Barion Cut, was introduced by Basil Watermeyer. This particular cut was somewhat difficult to make, because of the asymetrical lines. The true nature of the princess diamond origin goes back to an even longer period, 1961 to be exact, when a diamond cutter who was based in London, Arpad Nagy, created what was known then as a profile cut, which was then known as the princess cut. After a few years, Betzalel Ambar, Ygal Perlman and Israel Itzkowitz caused the cut to be popularly known as the “princess cut.

Princess Cut Diamond Pricing

Princess cut diamonds are very efficient diamonds for manufacturers. They use a very large percentage of the rough diamond (approximately 60% - 70%) and so the wastage is low. Because of the increased rough efficiency, they tend to hold more depth, meaning that more carat weight is found in the center or belly of the diamond, instead of being spread out to the sides. This makes them look visually smaller than round cut diamonds.

Knowing that the size is visually smaller, you can therefore expect to pay less for a princess cut than a round cut, holding all other factors the same.

Buying diamonds can be very time-consuming, as there are several factors to take into consideration for you to get the best value for your money. Buying a princess diamond does not come with a princess diamond guide, so if you have ever wondered how to buy a princess diamond, you can take a few things into consideration to get you started. The weight has to be at least 1.00 carats, it would have to have good to excellent symmetry and be well-polished, the color should be a G rating, or above, not florescent, and of a good length to width ratio for whether square, or rectangle princess cut diamonds.

When it comes to evaluating diamonds, one of the most important factors to consider is the cut the other three factors, which is a part of the four C’s, is clarity, carat and the color. These other three are also important, but the cut is the most important, as it can determine the level of sparkle that emanates from the diamond. Princess diamond value can be determined by its well-proportioned facets and the angle at which it reflects and refracts light. It will be expensive if it maximizes the the effect of light and prevent said light from being seen through the rear of the stone. The brilliance of a well-cut stone is unmatched by one that has a substandard cut, as it is lifeless and dull. The square cut is also less expensive than the round cut, as there is no excess material from a square cut, but there is, from a round cut.

Princess Diamond Guide

Princess cuts can be either square or rectangular. The ideal ratio, from length to width, of a square princess cut is 1.00 to 1.04. The ideal ratio of a rectangular princess cut is 1.07 to 1.15. Below are the proportion ranges for princess cut diamonds and their respective cut grades.

Depth % for Princess Diamonds

side view of princess cut diamond showing diamond depth

Excellent: 75%-66%

Very Good: 78%-62%

Good: 81%-55%

Table % of Princess Diamonds

top view of princess diamond showing table facet

Excellent: 75%-66%

Very Good: 77%-62%

Good: 82%-55%

Length to width Ratio for Princess Diamonds

square princess cut diamond


1.05 ratio for princess cut diamond showing squarish shape


princess diamond with 1.10 ratio showing rectangular shape


Princess Diamond Size Chart

Princess cut diamonds have approximate millimeter sizes that correspond to certain carat weights. Please see a chart of the popular princess cut diamond sizes and their carat weights. For all sizes and shapes, please visit our diamond size chart page.