Agatha

Heart Shaped Lab-Grown Diamond Three Stone Engagement Rings in Platinum Under £3,000

1 handcrafted design · Hatton Garden, London

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 heart shape is the most overtly romantic diamond cut — a modified brilliant with a distinctive cleft at the top. It requires exceptional cutting skill to achieve symmetrical proportions and balanced lobes. Heart shaped diamonds are a bold, meaningful choice for those who want their engagement ring to make a romantic statement.

Three Stone rings with a 1ct lab-grown diamond start from £2,869

At 1ct, even lab-grown three stone rings start above £3,000.

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

Pricing Guide

Heart Diamond Price Guide

0.50ct

Ring from

£2,886

0.70ct

Ring from

£2,861

1ct

Ring from

£2,926

1.50ct

Ring from

£3,040

2ct

Ring from

£3,411

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

1 result

Heart Shaped Lab-Grown Diamond Three Stone Engagement Rings in Platinum Under £3,000 — FAQs

Stay Connected

Be the First to Know

New collections, exclusive offers and jewellery inspiration from Hatton Garden.