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Radiant Cut Lab Grown Diamonds

Radiant cut lab grown diamonds feature an elongated or square shape with a brilliant-cut facet pattern, and are known for exceptional sparkle.

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A curated assortment of our most innovative diamonds

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Lab grown radiant diamonds feature a chic square shape with brilliant facets uniquely complemented by soft corners. They feature a beautiful combination of the 'hall-of-mirrors' look that step-cut stones retain as well as the brilliant faceting of other more traditional diamond shapes. A lab grown radiant diamond is a fabulous alternative to a more common jewelry shapes like round, making for a unique piece of fine jewelry sure to catch the light and the eye.


Once you have selected the perfect lab grown radiant diamond, it is time to find a setting to match it. Our curated selection of designs ranges from nature-inspired to ultra-modern. Plain bands give way to luxe diamond-accented styles, while other settings are unique enough to catch the eye. Choose a setting for your radiant lab grown diamond that will complement and enhance its beauty.

Radiant lab grown diamonds at Brilliant Earth span a wide range from under 0.30 carat to more than 10 carats, covering popular sizes like 0.5 ct, 1 ct, 2 ct and larger. Browse listings to see exact carat increments and options for each stone.
Radiant lab grown diamonds are offered in cut grades such as Super Ideal, Ideal, Very Good, and Good depending on the stone and grading report. Cut grade describes how well the diamond’s facets are proportioned to affect brilliance and sparkle.
Common filters include carat, price, cut grade, color, clarity, report lab, L:W ratio, fluorescence, polish, symmetry, and delivery options. These attributes help narrow choices within the radiant lab grown diamond selection.
Radiant lab grown diamonds are available in color grades from D through J and clarity grades from IF and VVS down to SI and I depending on the stone. Listings show each diamond’s specific color and clarity so you can compare options.
Each listing displays carat weight, cut grade, color, clarity, L:W ratio, measurements, depth and table percentages, fluorescence, polish and symmetry grades, and the reported lab name. Many diamonds also include high-resolution images and the lab grading report for full details.
Two diamonds with identical grades can differ in measurements, facet pattern, length-to-width ratio, fluorescence, and face-up appearance, which affect how each stone reflects light. Comparing images, measurements, and reports helps spot these distinctions.
Yes, many radiant lab grown diamonds on Brilliant Earth include 360-degree views, magnified photos, or videos so you can evaluate the stone’s face-up appearance and proportions. Look for the visual tools on each diamond’s detail page.
Radiant lab grown diamonds can be accommodated by a variety of settings including solitaire, halo, three-stone, bezel, and vintage-inspired designs, among others. A Brilliant Earth jewelry specialist can help identify settings that match the radiant shape and your style preferences.
Radiant diamonds commonly fall near square proportions with L:W ratios around 1.00 to 1.15, with slightly higher ratios yielding a more rectangular outline. Review the L:W ratio on each listing to choose the overall silhouette you prefer.
Yes, you can add a selected radiant lab grown diamond to an engagement ring using the Add to Ring option on Brilliant Earth, or a Brilliant Earth jewelry specialist can assist with pairing the loose diamond and setting.

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