Radiant Cut Lab-Grown Diamond Three Stone Engagement Rings in Platinum Under £1,500

Platinum and lab-grown diamonds together represent the pinnacle of modern engagement ring design — the purest metal paired with the smartest diamond choice. Platinum's neutral white lets the lab-grown diamond's brilliance shine without colour interference.

The radiant cut combines the elegant shape of an emerald with the brilliant-cut faceting of a round, producing exceptional fire in a rectangular or square silhouette. Its cropped corners give it a distinctive look that is both modern and versatile, while its faceting pattern hides inclusions well.

The purest choice for a lifetime of wear. Platinum is 95% pure, naturally white, and will never fade or yellow over time. It is denser and heavier than gold, giving your ring a satisfying weight and substance. Platinum is hypoallergenic, making it ideal for sensitive skin.

The £1,000–£1,500 range opens up a wonderful selection of lab-grown diamond engagement rings with larger centre stones and more setting options. This is one of the most popular budget ranges for couples choosing lab-grown diamonds.

The platinum premium is more than offset by lab-grown diamond savings — delivering luxury without compromise.

Three Stone rings with a 1ct lab-grown diamond start from £4,547

At 1ct, even lab-grown three stone rings start above £1,500.

Need help finding the perfect ring? Book a free consultation — our experts can work with any budget.

Pricing Guide

Radiant Diamond Price Guide

0.50ct

Ring from

£4,543

0.70ct

Ring from

£4,531

1ct

Ring from

£4,556

1.50ct

Ring from

£4,705

2ct

Ring from

£5,002

Radiant diamond prices updated daily. Book a free consultation to see diamonds in person at our Hatton Garden atelier.

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Radiant cut engagement rings are a flawless combination of rectangular elegance with softened edges and brilliant-cut sparkle. A hybrid diamond shape, the radiant cut is a clever fusion of the step cut of the emerald and the brilliant cut of the round — delivering exceptional fire from every angle.

From solitaire to side stone settings, discover our radiant cut designs or create your own through our ring builder in 18kt white, yellow, or rose gold, or platinum.

Radiant Cut Lab-Grown Diamond Three Stone Engagement Rings in Platinum Under £1,500 — FAQs

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