Radiant Diamonds

Radiant cut diamonds are rectangular or square diamonds with cropped corners and modified brilliant faceting. The radiant was the first rectangular cut to apply full brilliant facet technology to a non-circular outline, enabling it to produce sparkle and fire comparable to round brilliants in a square or rectangular format. Developed in 1977, the radiant cut fills the gap between the sparkle of princess cuts and the step-cut depth of emerald cuts, making it the liveliest rectangular diamond cut available.

Radiant cut diamonds are dramatically more sparkly than emerald cuts because they use brilliant faceting rather than step faceting. Where an emerald cut produces broad calm reflections and transparency, a radiant produces rapid scintillation and fire through its 70 facets. The two cuts are often compared by buyers who want a rectangular diamond but must choose between sparkle and understated clarity. Radiant is the sparkle choice; emerald is the sophistication choice.

Radiant diamonds retain color slightly more than round brilliants due to their modified facet arrangement, similar to other fancy shapes. A color grade of G or better is generally recommended in white gold settings. The same grade as oval — G to H — suits most buyers who want a face-up white appearance. In yellow or rose gold settings, I or J color is acceptable and may complement the warm metal tone intentionally.

Four-prong settings aligned with the four cropped corners are the standard for radiant cut rings. Halo settings around a radiant center create an elaborate configuration that amplifies the stone's presence. Channel-set baguette or round side stones flanking the radiant create clean three-stone configurations. The cropped corners of a radiant do not require V-prongs like princess cuts, simplifying setting choices. For how the main engagement ring settings and styles differ, read the engagement ring styles guide.

Square radiant cuts at a 1.00 to 1.05 length-to-width ratio are the most popular because they look fully square from the top. Elongated radiants at 1.20 to 1.35 create a visibly rectangular stone with a finger-elongating effect. Ratios above 1.40 produce a distinctly elongated radiant that approaches a marquise-like narrow appearance. Square radiants are often preferred over princess cuts by buyers who want a square brilliant with more forgiving corners.

Neither is objectively better. Princess cuts have sharp 90-degree corners and deliver maximum geometric precision. Radiant cuts have cropped corners and produce more scintillation through their 70-facet design. Radiant corners are more resistant to chipping than princess corners. Princess produces cleaner geometric lines; radiant produces more sparkle. For daily wear durability and sparkle, radiant is generally considered the more practical square brilliant.

Radiant cut jewelry at Oath includes rings in solitaire and halo configurations, and earrings. The shape is primarily used for diamond rings. For the full radiant ring and jewelry range across all settings, the radiant shape page covers every piece in the catalog.

Yellow gold settings for radiant diamonds are available in 14k and 18k. Yellow gold and radiant cut create a warm combination that suits buyers who prefer a traditional aesthetic with the sparkle of a brilliant cut.

Radiant has cropped corners and produces more scintillation and a crisper sparkle pattern. Cushion has rounded corners and produces warmer fire with a softer vintage character. For buyers choosing between rectangular or square brilliant cuts, radiant is the more modern and geometric choice; cushion is the warmer and more romantic choice. For the full cushion diamond range for comparison, browse cushion diamonds for the complete cushion range.

Radiant cut diamonds appear primarily in engagement ring configurations. Solitaire four-prong settings and halo designs are the most common. Three-stone settings with a radiant center and round or baguette side stones are popular contemporary choices. For the full diamond ring range covering radiant and every other shape, browse diamond rings for every available configuration.