Radiant Cut Diamonds = Elegance & Brilliance

Radiant cut diamonds are described by the Gemological Institute of America (GIA) as “Cut Cornered Rectangular Modified Brilliant” diamonds. In “English”, this means that they have a square shape with cropped corners. This diamond cut is a nice bridge between a cushion and princess cut. Also worth mentioning is that the radiant cut is a very forgiving cut. It will not magnify inclusions, imperfections, or color tints in the diamond. Instead it actually hides small flaws. 

Examples of Radiant Cut Diamonds

Radiant Cut Diamond
Radiant Cut Diamond
Emerald Cut Diamond
Asscher Cut Diamond

Characteristics To Look For


An ideal radiant cut diamond has trimmed, truncated corners (similar to a princess cut) and parallel sides. Because of this, the risks of the diamond breaking, chipping or being caught on something are greatly reduced. Generally speaking, you should avoid stones where corners are uneven – either too wide or too narrow. For a radiant cut diamond shape that is perfectly square, look for a length-to-width ratio of 1.0. If you prefer more of a rectangular shape, look for length-to-width ratios greater than 1.0. Keep in mind that anything 1.05 or less will appear square to the naked eye. Always pick stones that have good symmetry since asymmetrical facets will seriously impair the look and brilliance of a radiant cut diamond.


Table ratio (width of table facet divided by diamond width) for a good radiant cut diamond is around 54 percent and above. They are generally cut very deep, with an average of 70 facets. Total depth ratio (depth divided by diamond width) of a radiant cut diamond should be around 57 percent and above. For the most part, you should look for a diamond with a centered culet (the sharp point at the bottom of the diamond).

Also, avoid stones that have extremely thin or extremely thick girdle thickness. Keep in mind that radiant cut diamonds form an extensive pavilion (the underside of the diamond). This further contributes to their striking fire and flash.

Color & Clarity

Evaluating color and clarity in radiant cut diamonds can be subjective. For a good quality radiant cut diamond on a modest budget, look for a stone with a color range of I and above and a clarity range of SI2 or above. Note, GIA grades diamonds on a color scale of D (colorless) through Z (light color). Their clarity scale is FL (flawless) through I3 (visible inclusions). 

One Final Note

Try to look for radiant cut rings through jewelers who can provide certificates from reputable laboratories. Reputable laboratories include GIA, AGS, EGL-USA, and IGI. For estate or vintage radiant cut diamond rings, the rings should come with an appraisal and a certificate of authentication. Don’t worry if this seems confusing. If you choose to get your ring with Vanessa Nicole, she will ensure that all of your diamond choices are in line with the ideal standards for a GORGEOUS radiant diamond.

Need Help?

Let Vanessa Nicole be your guide. Vanessa Nicole Jewels creates stunning, custom-made wedding bands and engagement rings for couples around the globe. Every ring we make is truly one of a kind, designed exclusively for each client. Contact Vanessa today to learn more about your options, or learn more by reading our diamond education article.

About Vanessa

Vanessa Nicole - jeweler

Hi, I’m Vanessa Nicole – master diamond setter and author of the best-selling book, The Perfect Custom Engagement Ring. My educational engagement ring videos have amassed nearly half a million views on YouTube, so be sure to check those out if you need design inspiration for your ring. When I’m not playing with diamonds, you can find me tickling my twin boys, or kicking back watching a movie with my awesome husband (my teenage sweetheart). 

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