A radiant cut combines a square or rectangular outline with cropped corners and a full brilliant facet pattern, built specifically to maximise fire and sparkle within a more architectural shape. It is, by design, one of the brightest cuts available.
Radiant Diamond Size Chart: MM to Carat
| Carat Weight | Approximate MM Size (Length x Width) |
|---|---|
| 0.50 ct | 5.0mm x 4.3mm |
| 0.75 ct | 5.8mm x 5.0mm |
| 1.00 ct | 6.4mm x 5.5mm |
| 1.50 ct | 7.3mm x 6.3mm |
| 2.00 ct | 8.0mm x 6.9mm |
Figures assume a standard length to width ratio near 1.15. An IGI certificate confirms a specific stone's actual measurements.
Why It's Considered the Brightest Cut
A radiant's facet pattern was specifically engineered to combine a square or rectangular outline with the brilliance of a round cut, avoiding the darker, quieter look step cuts like the emerald can show. The result is a shape that hides small inclusions relatively well while delivering genuine fire.
Square vs Rectangular Radiant
A square radiant reads closer to a princess cut with softened corners, while a rectangular radiant offers a more elongated silhouette similar to an emerald cut, but brighter. Both share the same cropped corner structure and brilliant facet pattern.
Best Settings for a Radiant Diamond
A four prong setting covering each cropped corner protects the stone's vulnerable points, the same consideration as a princess cut. Because a radiant already reads as bright and detailed, a clean, simple band tends to suit it better than an equally ornate setting.
Explore Radiant Cut Pieces
Browse Nivara's radiant cut lab grown diamond rings, all IGI certified.
