Round lab diamonds

Round cut diamonds deliver the strongest sparkle of any shape and remain the most popular choice worldwide. Our lab grown selection lets you compare thousands of certified diamonds with clear transparency on price, cut, clarity and light performance.

Buy with confidence - purchases are covered by our 14 day return policy, and our lifetime care policy. Need help selecting the right diamond? Our concierge team is ready to help.
GIA & IGI Certified GIA & IGI Certified
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0.30ct Round Natural Diamond (Colour J, Clarity VS1, Cut EX, IGI Certified)

How to choose a round lab grown diamond

  • Prioritise Excellent/Ideal cut for maximum brilliance
  • Look for polish and symmetry rated Excellent
  • Aim for depth 59–63 percent and table 54–58 percent
  • Avoid stones with strong leakage or poor fire
  • Check certification from IGI or GIA
 Read our guide

Frequently asked questions
Are lab grown round diamonds as bright as natural ones?

Yes, they have the same optical structure and can achieve identical brilliance.
Do round diamonds look larger than other shapes?

Round diamonds do not maximise spread, but their brightness creates a visually larger effect.
Which clarity is best?

VS2 and higher usually ensures a clean look at normal viewing distance