Radiant cut diamond – Brilliance meets geometry
Radiant cut diamonds combine the best of two worlds: the classic brilliance of round and cushion-cut stones, and the modern geometry of emerald and princess-cut shapes. The result is a versatile and sparkling shape with a distinct personality.
History and characteristics
The radiant cut was developed in the 1970s by Henry Grossbard – a master at combining light optimization with clean lines. The shape is rectangular or square with beveled corners and a brilliant facet pattern that covers the entire stone.
Unlike other square shapes with step facets, the radiant has a complex brilliant cut even on the pavilion, which provides intense sparkle and fire.
Advantages of radiant cut
- Exceptional brilliance – almost on par with round brilliants.
- Versatile shape for both modern and classic rings.
- Durable corners thanks to beveled design.
- Provides visual magnification – especially in rectangular format.
Recommended proportions for radiant cut
| Class | Table % | Depth % | Ratio |
|---|---|---|---|
| Excellent / Ideal | 61–69 | 61–67 | 1.00–1.05 (square) / 1.20–1.30 (rect.) |
| Very Good | 58–70 | 59–69 | 1.00–1.10 |
| Acceptable | 56–72 | 57–71 | 1.00–1.15 |
Tip: Use 360° view to check symmetry, centering of facets, and any bow-tie effect. Learn more about proportions .
Size guide in mm for radiant
| Carat | Dimensions (approx. mm) | Link |
|---|---|---|
| 0.50 ct | 4.8 × 3.6 | See stones |
| 1.00 ct | 6.5 × 5.0 | See stones |
| 1.50 ct | 7.5 × 5.5 | See stones |
| 2.00 ct | 8.5 × 6.0 | See stones |
| 3.00 ct | 9.5 × 7.0 | See stones |
| 5.00 ct | 11.5 × 9.0 | See stones |
What should you consider when choosing a radiant heater?
Color: Brilliant facets mask color relatively well. For white metal, D–H is recommended, for yellow gold also I–J .
Clarity: SI1–VS1 provides a good balance between price and purity.
Cut: No official cut grade for radiant – focus on polish, symmetry and 360° viewing. Read more here .
Radiant bezels
- Solitaire – maximum brilliance with stylish framing
- Halo – visually enhancing and luxurious
- Tresten – classic with side stones
- Vintage – art deco inspired rings
Natural vs. Lab-Grown Radiant Diamonds
At Diamant Banken you will find both natural and lab-grown radiant diamonds – always certified and selected with a focus on light performance.
Easily filter our range
In our range – both natural and lab-grown – you can filter by radiant, carat, color, clarity and certificate. All stones are shown with dimensions in mm and 360° view for the best overview.