Round Brilliant Engagement Rings

The round brilliant is the most popular — and most brilliant — diamond shape, engineered over more than a century to return the maximum sparkle to the eye. Our round cut engagement rings pair this timeless stone with settings for every taste, from classic solitaires to diamond-shouldered halos, each in certified lab-grown or natural diamonds.

See how it compares to other shapes in our diamond shapes guide, and learn what really drives sparkle and value in our diamond 4Cs guide. Prefer a softer, elongating outline? Explore our oval cut rings. Every ring is ethically crafted with transparent pricing and complimentary resizing for one year, backed by free, no-pressure advice from our London team.