Radiant cut engagement rings are loved for their brilliant sparkle, sleek rectangular shape, and modern elegance. With up to 70 facets and softly trimmed corners, the radiant cut combines round-diamond fire with a refined silhouette. At Flawless Fine Jewellery, every radiant engagement ring is handcrafted in natural or lab-grown diamonds built entirely around you.

Create a radiant cut engagement ring that feels personal from the first idea to the final design. Our design specialists will guide you through diamond selection, setting styles, metal choices, and CAD design. You can compare radiant diamond engagement rings in natural or lab-grown diamonds, then craft a custom ring with the right balance of sparkle, proportion and personal detail.
Turn your unique idea into reality with Flawless accuracy. Book a private consultation to design your radiant cut diamond engagement ring.
The radiant cut is the only diamond shape that combines a rectangular silhouette with a full brilliant-cut facet pattern. Its trimmed corners bring together the elegance of an emerald cut with the brilliance of a round diamond, producing up to 70 facets that maximise light return, fire, and scintillation. Unlike an emerald cut — which uses step faceting to create mirror-like reflections — a radiant cut blazes with continuous sparkle even in low light. The trimmed corners also make it one of the most durable fancy shapes for everyday wear, eliminating the vulnerable pointed tips found on princess or marquise cuts. Not sure which diamond shape is right for you? [Read our complete radiant cut diamond buying guide]
At Flawless Fine Jewellery we offer both natural and lab-grown radiant cut diamonds across our full collection. Lab-grown radiant diamonds are chemically and optically identical to mined stones — graded to the same IGI and GIA standards — and typically offer a significantly larger stone for the same budget. If size and sparkle are the priority, a lab-grown radiant cut delivers both without compromise. If long-term rarity and provenance matter more, a natural radiant cut certified by GIA or IGI is the right choice. Our Hatton Garden specialists will walk you through both options side by side, with no pressure either way.
Yes, and for practical reasons as much as aesthetic ones. The radiant cut’s 70 facets produce exceptional brilliance, its trimmed corners make it one of the most durable fancy shapes for daily wear, and its rectangular silhouette creates a finger-elongating effect that flatters most hand types. It’s also one of the rarer choices on the high street, meaning your ring will stand apart from the crowd.
Radiant cut diamonds use brilliant faceting, which creates strong sparkle and fire. Emerald cut diamonds use step-cut faceting, giving a cleaner, mirror-like look with less sparkle. Both have a rectangular shape, but radiant cut diamonds are better for buyers who want more brilliance.
Both princess and radiant cut engagement rings offer strong sparkle, but radiant cut diamonds often show more fire and depth because of their brilliant facet pattern. Princess cuts have sharp, modern brilliance, while radiant cuts combine sparkle with softened corners and a more elongated look.
Yes. Our in-house designers can help you create a custom radiant cut engagement ring, from choosing the diamond and setting to refining the final design. Each ring is made around your style, preferences, and budget, with expert guidance throughout the process.
Yes, We have a wide collection of radiant cut engagement rings in both of our Hatton Garden, London or Manchester showrooms. You’re welcome to visit or book a private appointment for a tailored experience.
Yes, we offer one-on-one virtual appointments where our professionals will suggest radiant cut diamond options to you through video conferencing.
We do. Our collection includes radiant cut engagement rings with matching bands, or we can design custom sets to match your ring style.
The bowtie effect is a dark shadow across the centre of a radiant cut diamond, usually caused by poor light return. A well-cut radiant cut engagement ring should have balanced sparkle with minimal bowtie, so our specialists review each diamond carefully before recommending it.
For radiant cut engagement rings, a 1.20 to 1.35 ratio creates an elegant elongated shape, with 1.25 often seen as a balanced choice. Square radiant cuts usually sit around 1.00 to 1.10, depending on the look you prefer.
Yes. A radiant cut diamond can appear larger than some other shapes at the same carat weight because of its broad face-up surface. This makes radiant cut engagement rings a beautiful option for buyers who want impressive sparkle, visual size, and strong value.