Radiant Cut Diamonds

The radiant cut diamond is a beautifully symmetrical, non-traditional cut, the radiant cut combines the brilliance of a round and the purity of an emerald cut. Trimmed corners give it versatility among all kinds of jewelry, especially engagement rings. The faceting of a radiant cut gives it a fiery look compared to a princess cut, while maintaining soft, cut corners. The radiant fuses the plus points of other popular diamond shapes. Radiant cut diamonds are often called the “rectangular modified brilliant diamond.” Simply put, these are the squarer version of the common, round brilliant diamonds. Radiant cut diamonds are in the gemstone cut group known as “hybrids.” The rectangular radiant cut is an excellent option for buyers who like the emerald cut shape, but want something with the brilliance of a round. Radiant cut diamonds tend to be a very popular choice for fancy colored diamonds because they capture more rough diamond color than other cuts. A ratio of 1.00 to 1.05 will create a square shape, and from 1.30 to 1.50 will produce a rectangle.

What is a Radiant Cut Diamond

The modern radiant diamond itself is less than 40 years old. Henry Grossbard created the very first radiant cut diamond in the late 1970’s. He was part of Radiant Cut Diamond Company, who released the first radiant diamond in ’77. Grossbard’s creation changed the way rectangular diamonds were viewed and developed. His was the first to have such an intricate facet pattern on the pavilion of the stone as well as the crown. Every other rectangular-shaped diamond before this release had fewer facets, less attention to the finer details, and shone less brilliantly than Grossbard’s version. In 2002, RCDC launched its own specific brand; the “original radiant cut.”

Despite its “youth” in the diamond community, the radiant cut diamond is easily among the most popular diamonds cuts, thanks to its versatility and brilliance. Celebrities such as Megan Fox, Khloe Kardashian, and Drew Barrymore love their radiant cut jewelry.

Radiant Cut Diamond Settings

Radiant cut diamond engagement rings are some of the most popular choices of rings today due to the unmatchable shine they produce. Once the buyer has chosen to purchase a radiant cut diamond, the next logical step is to choose a setting to complement this choice in diamond cut. The most popular and logical setting to choose for a radiant style engagement ring is the four-prong setting. This setting allows for the most light to reach the stone which, in turn, allows the most sparkle to occur. Along with being beautiful and complementary to the luster of the ring, this setting securely clasps on to the stone to ensure a safe and secure setting for years to come. By using four prongs, the stone is unlikely to become loose and fall out. To ensure further security of the stone, a six-prong setting would give even more strength to the setting to keep the stone in its place. However, with six prongs, the stone becomes more hidden from the light. With that being said, a six-prong setting will have significantly less shine than a four-prong engagement ring.

Bezel settings, although they may be used, are not recommended for radiant cut diamonds. A bezel setting is a closed setting that encloses the center stone for a secure and cohesive feeling, but by closing itself off, the bezel setting hinders the amount of light that will hit the stone. Thereby, the setting will cause a significant loss to the amount of shine of the ring.

Prong Setting & Solitaire Setting for Radiant Cut Diamonds

Prong settings are given this name because they contain a prong, also known as a small and sturdy metal claw that tightly grips the diamond and holds it into place. Prongs can be rounded, flat, or pointed. They can have either 4 or 6 prongs, it’s personal preference. 4 prongs allow for more of the diamond to be shown, but 6 prongs are more secure and safe for the diamond.

The main benefit of using a prong to hold the diamond in the ring is that there's less overall metal, showing off more of the actual diamond. This also allows for more light to pass through the diamond, which adds a lot to its brilliance.

Here are some benfits of the prong solitaire setting:

  • Simple maintenance and cleaning

  • Provides the ring-wearer with a timeless and classic look

  • Supports a wide variety of diamond sizes

  • Elevates the diamond, which makes it more prominent

  • Allows for more light to apss through the diamond, giving it more brilliance

Another common setting is the Halo setting. This is for people who want something that stands out more and is a bit more "flashy." Here ar esom eappealing aspects of a halo setting:

  • The Tiffany setting

  • Tension setting

  • Bezel setting

  • Cathedral setting

  • Channel setting

  • Pavé setting

  • Flush setting

  • Bar setting

  • Three-stone setting

  • Cluster setting

  • Shank/split shank setting

Radiant Cut Diamonds Vs Cushion Cut Diamonds

Radiant cut and cushion cut diamonds can be quite similar, making it hard to choose what one to buy. The main difference between the radiant and cushion cut diamonds is their shape. Radiant cut diamonds have a rectangular outline, and the corners of it are cut. Meanwhile, cushion cut diamonds have rounded sides, so it doesn't look as rectangular as a radiant cut diamond. Sometimes cushion cuts can even have an oval appearance to them.

Both radiant and cushion cut diamonds belong to a group called “brilliant cuts.” This simply means that all of their facets are arranged and shaped so that their brilliance is enhanced. Radiant cuts have been known to exhibit more brilliance than cushion cuts. In terms of clarity and color, there’s no major difference between the two cuts. Their color and inclusions usually look very similar.

What to Know When Purchasing Radiant Cut Diamonds

One very appealing aspect of buying a radiant cut diamond is that you get an engagement ring style that has the same flash and brilliance of a round diamond cut, but in a square cut.

A benefit is that radiant cut diamonds are a forgiving cut. This means that even if the diamond does have any inclusions, the cut will instantly hide these small flaws.

One downside of radiant cut diamonds is that due to how deep they are cut, a 1 carat radiant diamond will not look that large compared to a diamond that has a more shallow cut (such as a 1 carat emerald cut diamond).

Additionally, radiant cut engagement rings can be hard to find, especially ones that are high quality.

Popularity of Radiant Cut Diamonds

Although Radiant Cut Diamonds are not the most popular or purchased diamond cut out there, they are still caught after by many women all over the world. They are especially appealing to women who prefer a more unique style with a gorgeous sparkle. Many people are also opting for wedding bands that include radiant cut diamonds.

Radiant Diamond Guide

Please see the ideal table, depth and length to width ratio combinations for radiant cuts. An important consideration when selecting a radiant cut is the color. Radiant tend to show color more than round diamonds due to less depth in the tips. A G color cushion will look closer to an H color diamond. Consider one higher color grade with radiant shapes, when compared to round shaped diamonds.

Depth % for Radiant Diamonds

side view of radiant diamond showing its depth

Excellent: 75%-64%

Very Good: 78%-62%

Good: 84%-56%

Table % of Radiant Diamonds

top view of radiant diamond showing the tablet facet

Excellent: 76%-62%

Very Good: 78%-60%

Good: 82%-55%

Length to width Ratio for Radiant Diamonds

a shorter 1.10 length to width ratio radiant diamond


optimal 1.25 ratio of length to width for a radiant cut diamond


a longer radiant cut diamond with a 1.35 length to width ratio


Radiant Diamond Size Chart

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

size chart for radiant cut diamonds with carat weights and millimeter sizes
size chart for radiant cut diamonds with carat weights and millimeter sizes size chart for radiant cut diamonds with carat weights and millimeter sizes size chart for radiant cut diamonds with carat weights and millimeter sizes

Radiant Cut vs Cushion Cut

Radiant cut diamonds are a popular choice due to their rectangular shape that seems to complement all finger types and style choices, but couples may be overwhelmed by their choices because a cushion cut ring is also rectangular. With so many cuts of diamond with such a similar shapes, it can be extremely difficult to observe the pros and cons of each diamond shape. A radiant cut diamond has cropped corners while a cushion cut diamond has curved edges. Although this is a fundamental difference between the two stones, the buyer is usually unable to tell once the stone is set. The main difference between the two cuts of diamonds is the brilliance. A radiant cut diamond will produce more sparkle and luster than a cushion cut. Besides these key differences, the diamond shapes are very similar and will attract the same type of bride.

Despite its “youth” in the diamond community, the radiant cut diamond is easily among the most popular diamonds cuts, thanks to its versatility and brilliance. Celebrities such as Megan Fox, Khloe Kardashian, and Drew Barrymore love their radiant cut jewelry.

Popularity of Radiant Cut Diamonds

Radiant cut diamond rings are incredibly popular in the diamond world due to the step-cut of the facets. This particular cutting style allows the ring to have its famous shine. Since the stone can maximize the amount of shine in such a small area, buyers flock to it, considering it the biggest bang for their buck. The popularity of the ring does not just rely in the brilliance of it, but it is also due to the versatility of the ring’s shape. This particular shape pairs well with any finger shape or size to flatter any woman.

Additionally, a radiant cut diamond allows for a choice of a plethora of styles to complement the stone. It is not often that such a popular stone can have so many avenues for creativity; therefore, the diamond shape is also popular with the crowd seeking out a unique engagement ring. Whatever the buyer is looking for, the radiant cut diamond seems to have it- the brilliance, the shape, and the versatility.

Radiant Cut Pricing

Radiant cut diamonds, tend to have a larger pricing discount than other diamond shapes. Round diamonds have greater rough diamond wastage, whereas radiant diamonds use the maximum amount of diamond rough so they are very efficient from a diamond cutter’s perspective. Radiant diamonds tend to be a bit deeper affecting their visual appearance. A 1.00 ct marquise cut diamond will be about 6 x 5.5 mm versus a 1.00 ct round cut diamond, which will be about 6.4 mm. Learn more about diamond pricing.

Additionally, It is very important to examine a diamond’s length to width ratio when considering the shape. Radiant diamonds with a ratio of 1.25 with be in the optimal ratio. These possess the greatest premium in the radiant cuts. Shorter or longer radiant cut diamonds will look either a little thicker or slender and longer. This isn’t necessarily a bad thing, but merely a preference. Shorter radiant diamonds will look smaller and slender, long length to width ratios will look larger. While the average customer isn’t an experienced jewelry craftsman or appraiser, the evenness of the radiant cut diamond’s edges should be apparent to the naked, untrained eye. If the diamond appears crooked in the setting, or the entire ring sits a bit off center on your finger, it is probably not parallel. Some people believe that a square is a square is a square. However, if you are set on buying a radiant cut diamond, check the corners of the gemstone! Emerald and princess cut diamonds, as well as other square and rectangle shaped stones, have the sharp corners; the radiant cut diamonds do not.

The price difference between different carats of diamonds is incredibly large. With smaller diamonds, the price is much lower due to the size and availability in nature. Once a stone reaches 2 carats, the price can reach to a little over 20,000 dollars. That price skyrockets when another carat is added to the stone. While this is true of all diamonds, radiant cut diamonds are definitely on the high side of diamond pricing.

As usual, when purchasing a radiant diamond ring, a buyer should seek out a professionally-graded stone. This grade ensures that the stone is authentic and that the buyer can be sure of its value. One tip for buyers is to keep the length to width ratio in mind; make sure the stone has the proper measurements to make it a square or a rectangle. If the length to width ratio is not desirable, the stone may appear more oblong than rectangular.

Price Differences Between 2 Carat and 3 Carat Radiant Cut Diamonds for VS2 Quality

VS diamonds are diamonds that have minor inclusions. VS1 quality is the next higher level, and VS2 quality is even better. This means there will be no inclusions to the naked eye, and that the diamond has a very good clarity rating.

If you have a 2 carat VS2 diamond ring that is high quality, it will sparkle and truly show off its brilliance. Sometimes 2 carat radiant cut diamonds can be hard to find. 2 carat referee to how much the diamond weights. 2 carats weighs the same as 400 milligrams (0.4 grams). This is approximately the same weight as half of a raisin.

3 carat diamond rings are more expensive than 2 carat ones, because they weigh more. 3 carats is the same amount of 600 milligrams, which is 0.6 grams. This is almost the same weight as a full raisin. 3 carat diamond rings will have more brilliance than 2 carat ones.

Tips When Radiant Cut Diamonds

One major advantage of choosing a radiant cut diamond is that it allows for the inclusions and blemishes of the stone to be hidden better. Many diamond cuts accentuate the flaws of the stone, and therefore, the radiant cut diamond is special in its ability to hide them. Additionally, the radiant cut diamond is incredibly versatile which means that the cut will look incredible with a multitude of styles. A radiant cut diamond can be paired well with almost anything!

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