The round brilliant cut diamond is the most popular diamond shape in the world, accounting for approximately 75% of all diamonds sold. Renowned for its unrivalled sparkle, the round brilliant features 57 or 58 precisely angled facets that are engineered to maximise brilliance (white light reflection), fire (spectral colour dispersion), and scintillation (the pattern of light and dark flashes as the stone moves). No other diamond shape delivers quite the same intensity of light performance, which is why it remains the definitive choice for engagement rings.

When selecting a round brilliant cut diamond, ideal proportions are essential. Look for an Excellent or Ideal cut grade, a table percentage between 54% and 57%, and a depth between 61% and 62.5%. These parameters ensure that light enters the crown, bounces between the pavilion facets, and returns to the eye with maximum radiance. At Hatton Garden Bespoke Jewellery, our expert gemmologists hand-select every round brilliant diamond, examining each stone beyond its certificate to guarantee exceptional optical performance.

One of the greatest strengths of the round brilliant is its extraordinary versatility. It looks breathtaking in every ring setting imaginable - from a classic solitaire or elegant six-prong Tiffany-style mount to a glamorous halo, a sleek bezel, or a sparkling pavé band. Whether set in platinum, white gold, yellow gold, or rose gold, the round brilliant adapts beautifully to any metal and any style, making it perfect for those who appreciate timeless elegance as well as modern sophistication.

The round brilliant cut is ideal for anyone who wants guaranteed sparkle and a shape that will never go out of fashion. It suits every hand shape and finger length, and its symmetrical profile makes it one of the easiest diamonds to match with wedding bands and eternity rings. If you value light performance above all else, the round brilliant is the diamond for you.

Visit our Ring Studio to begin designing your perfect round brilliant engagement ring, or explore our guide to the 4Cs of diamonds to learn how cut, colour, clarity, and carat weight influence the beauty and value of your stone. To discuss your vision with one of our Hatton Garden specialists, please get in touch - we would be delighted to help you find or commission the ring of your dreams.

Our team of experts are happy to help you with your questions and queries no matter how big or small. 

We like to work closely with our clients to really understand your vision. If you'd like to custom design a piece of fine jewellery, or simply learn more about diamonds, follow the link to book a consultation online or in person at our London workshop!