Radiant Cut Diamonds: Your In-Depth Guide - Do Amore

Radiant Cut Diamonds

Radiant cut diamonds are sparkly, rectangular stones with clipped corners. The Radiant has a whopping 70 facets, making it one of the most faceted diamond shapes available. Radiants are also quite unique. In fact, at the time of writing, less than 1.6% of diamonds for sale globally were Radiant (17,895 radiant cut diamonds out of 1,178,007 total diamonds).

Table, Depth & Other Specifications for Ideal Radiant Cut Diamonds

The cut of a Radiant diamond determines the style and quality of its sparkle. Radiants can be faceted in a traditional manner, giving off large sparkle, or in a more modern manner, giving a “crushed ice” appearance. Unfortunately, the GIA does not grade Radiants for cut. So, if you see a cut grade associated with a Radiant, it is the jeweler assigning it. While this is okay, you should always verify the cut matches your expectations.

Because how well a diamond is cut is the most crucial factor in maximizing the beauty, you want to make sure you understand the ideal cut specifications. The table below serves as a general guideline for evaluating the cut of a Radiant. These specifications will help ensure great sparkle, even brilliance, and elegant length-to-width ratio. You also want to look for a stone that does not have a dark bow-tie.

Pro Tips for your perfect Radiant Cut Diamond!

– Traditional shimmer-sparkle: Look for clean lines in the faceting on the bottom of your stone (the “pavilion”). You will often see a star or cross shape formed by the large facets on the pavilion.

Modern “crushed ice” brilliance: So, look for extra facets on the pavilion of your stone which create additional reflections. The top and bottom of your gem will look like “crushed ice.”

radiant

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"Ideal"/Excellent Cut (Most Sparkle)

Premium Cut

Average Cut

Table %

A percentage measuring the width of the top facet of the diamond, divided by the overall width of the diamond

62-69

58-61 or 70-72

55-57 or 73-74

Depth %

A percentage measuring the height (depth) of the diamond divided by the overall width of the diamond.

61.0 - 66.5

58.5-60.9 or 66.6-70.0

56.5-58.4 or 70.1-73.0

Girdle

The outmost edge of the diamond where the top (crown) of the diamond intersects with the bottom (pavillion) of the diamond.

Thin to Slightly Thick

Very Thin to Slightly Thick

Very Thin - Thick

Culet

The small area at the very bottom of a diamond that looks like a point.

None

Very Small

Very Small

Length to Width Ratio

The length of a diamond divided by its width. When comparing diamonds, those with larger ratios appear more rectangular (less square)

1.20-1.35

1.15-1.19 or 1.36-1.40

1.11-1.14 or 1.41-1.45

Bow-tie

The middle area of an Oval which can sometimes appear dark, like a man's "bow-tie."

Minimal

Slightly Dark

Dark

Color Recommendations for Radiant Cut Diamonds

The color grade of a Radiant cut diamond refers to how much yellow tint (or lack of a yellow tint) the diamond shows. Smaller Radiants hide color better than larger Radiants do, so depending on the size of diamond you purchase, you may not need to buy a colorless (D-F) diamond, even if you want your diamond to appear colorless. The chart below will help you decide on the color grade of Radiant to purchase based on if you want a colorless diamond, a diamond with a slight tint, or a warmer diamond.

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Carat Weight

No Visible Color

Slight Tint

Prefer a Warmer Color

< 0.5

D - I

J - K

L - Z

0.5-1.0

D - I

J

K - Z

1.0-1.5

D - H

I

J - Z

1.5 +

D - G

H - I

J - Z

Clarity Recommendations for Radiant Cut Diamonds

The clarity grade of a Radiant is based on how many and how severe the internal marks (“inclusions”) of the diamond are. It’s harder to see inclusions in smaller Radiants than in larger ones, so if you are buying a smaller stone you can likely get away with purchasing a lower clarity rating while keeping an eye-clean appearance. In addition, because Radiants have so many facets and a lot of sparkle, they hide blemishes fairly well (especially in comparison to their emerald cut counterparts).

Each couple will have their own standard for clarity. Some may be perfectly comfortable with inclusions as long as they cannot easily see them. Others may insist on a more technically flawless stone. The clarity chart below provides general guidelines for picking a clarity rating for your Radiant based on your inclusion tolerance.

Note! This chart assumes that your jeweler will check to ensure eye clean appearance, like we do! Trusting the clarity grade alone isn’t a good idea.

radiant
radiant

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Carat Weight

Clean Under 10X Magnification

Eye Clean

Visible Blemishes Okay As Long As Not Very Obvious

< 0.5

FL-SI1

SI2

l1

0.5-1.0

FL-VS2

SI1-SI2

l1

1.0-1.5

FL-VS2

VS2-SI1

Sl2

1.5 +

FL-VS1

VS2-SI1

Sl2

Length to Width Ratio for Radiant Cut Diamonds

All diamonds in our diamond search engine have the length to width ratio listed. This ratio, which is simply the length divided by the width, determines how skinny or wide the radiant diamond is. The larger the length to width ratio, the longer and more rectangular the Radiant. The smaller the length to width ratio, the more square the Radiant. Our personal favorite range for Radiants is 1.20-1.35.

Note about Radiant Halo Engagement Rings: If you opt to set your Radiant in a halo setting, the diamond may end up looking squarer. This is because the halo gives extra width. To avoid this, opt for a Radiant with a higher length to width ratio.

Squarish Radiant Cut Diamond

1.20

Rectangular Radiant Diamond

1.30

Elongated Radiant cut diamond

1.35

Settings that Pair Well with Radiant Cut Diamonds

Radiants pair well with most rings, however, their rectangular shape means they don’t flow well with every ring design. The below rings are a few of our favorite Radiant cut engagement rings. These Radiant engagement rings are available in all metals, including 14k white gold, yellow gold, rose gold, palladium, and platinum.

Money Tips

When looking for a Radiant, make sure to always maximize measurements. For example, you can have a 1.0 carat Radiant with the measurements 6.5 x 5.0 mm that is ideally cut. But, there could also be a 0.98 carat Radiant with measurements 6.6 x 5.1 mm that is just as ideally cut, and likely less expensive. All diamonds in our “Recommended” stone section above have had their dimensions reviewed to make sure they are maximized for their carat weight, while maintaining an ideal cut.

3 Things to Ask Your Jeweler

  • 01.

    Photo & Video

    Always ask the jeweler you are buying from for a detailed picture or video like these Radiants. Look for traditional or “crushed ice” appearance.

  • 02.

    Inspect It

    Ask the jeweler to pull the diamond and actually visually inspect your radiant cut diamond. Confirm eye-clean appearance.

  • 03.

    Measure It

    Make sure your Radiant’s length-to-width ratio is pleasing, and its measurements are maximized within your carat size.

Other Ring Resources

See our in-depth educational guides, which were made to give practical advice with every aspect of your ring.

Diamonds

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Moissanite

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Sapphires

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Gold Palladium & Platinum

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