History
The Cushion shape is an antique cut that resembles a cross between an Old Mine cut (a deep cut with large facets) common in the late 19th Century, early 20th Century and a modern Oval cut. This shape is also known as the pillow-cut or the candlelight diamond.
The Cushion is not as brilliant as many of the more modern cuts, but has a very classic romantic look and definitely stands out from other shapes.
Cushion Cut
The cut of a diamond determines its brilliance. A poorly cut diamond will have a dull appearance even if it has perfect color and clarity. The cut is considered one of the most important diamond characteristics by gemologists. It is based on factors that determine the light performance, dimensions, and finish of a stone.
The cut should reflect the maximum amount of light to the viewer's eye. For example, if a diamond is cut too shallow light will be lost out of the pavilion (bottom) and the diamond will lose brilliance. If the diamond is cut too deep, the light will escape through the sides and the diamond will appear dark.
Since Cushion cut diamonds are designed with larger facets, you need to be sure that you are familiar with the qualities of a good cut. A Cushion diamond makes a beautiful engagement ring as a solitaire or set with other stones.
Recommendations
When buying Cushion cut diamonds, there are a few recommendations for getting the best diamond. We recommend a cut rating of Excellent or Very good.
For budget minded purchasers of Cushion cut diamonds, you should follow the minimum Cut rating of Good.
Color, Clarity, and Length to width ratio are something to consider carefully when choosing this cut. Certain ratios offer a squarer look while others offer a shorter or more rectangular look. Color and Clarity are also very important because of the large facets. Cushions also suffer from a "bow-tie effect." This is a dark area across the center of the stone resembling a bow tie. This is visible in all Cushion cut diamonds and should be faint not dark.
Suggested Guidelines for Cushion Cut Diamonds
| Cut |
Excellent |
Very Good |
Good |
| Color |
D, E |
F |
G |
| Clarity |
IF, F, VVS1, VVS2 |
VS1 |
VS2 |
| Depth % |
59.0% - 65.0% |
58.0% - 58.9% or 65.1% - 67.0% |
57.0% - 57.9% or 67.1% - 70.0% |
| Table % |
53.0% - 57.9% |
58.0% - 65.0% |
65.1% - 75.0% |
| Girdle |
Medium |
Thin to Thick |
Very Thin to Very Thick |
| Ratio |
1.00 - 1.20:1.00 |
1.21 - 1.25:1.00 |
1.26 - 1.35:1.00 |