Select your centre stone
Every stone independently graded and certified.
319 results
0.71ct Round Natural Diamond (Colour I, Clarity SI1, Cut EX, IGI Certified)
0.71ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
0.72ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
1.24ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
0.90ct Round Natural Diamond (Colour J, Clarity SI1, Cut VG, IGI Certified)
0.90ct Round Natural Diamond (Colour J, Clarity VS2, Cut VG, IGI Certified)
0.70ct Round Natural Diamond (Colour J, Clarity SI1, Cut F, GIA Certified)
0.72ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
0.70ct Round Natural Diamond (Colour J, Clarity SI1, Cut VG, IGI Certified)
0.72ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
0.70ct Round Natural Diamond (Colour J, Clarity SI1, Cut F, GIA Certified)
0.70ct Round Natural Diamond (Colour J, Clarity SI1, Cut VG, IGI Certified)
0.70ct Round Natural Diamond (Colour J, Clarity SI1, Cut F, GIA Certified)
0.71ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
0.50ct Round Natural Diamond (Colour J, Clarity VS1, Cut EX, IGI Certified)
0.51ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
0.50ct Round Natural Diamond (Colour J, Clarity SI1, Cut VG, IGI Certified)
0.50ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
0.52ct Round Natural Diamond (Colour J, Clarity SI1, Cut F, IGI Certified)
0.50ct Round Natural Diamond (Colour J, Clarity VS2, Cut EX, IGI Certified)
0.50ct Round Natural Diamond (Colour J, Clarity SI1, Cut VG, IGI Certified)
0.50ct Round Natural Diamond (Colour J, Clarity SI1, Cut GD, IGI Certified)
0.50ct Round Natural Diamond (Colour J, Clarity SI1, Cut GD, IGI Certified)
0.51ct Round Natural Diamond (Colour J, Clarity SI1, Cut EX, IGI Certified)
Natural Round Diamonds
The round brilliant is the shape the entire diamond market is priced against, which is exactly why a natural round is the easiest stone to buy well and the easiest to overpay for. Supply here is deeper than in any other shape, so two stones with the same weight and the same letters on the report can sit a long way apart on price — and the difference is almost always cut.
Cut is the one grade we would not compromise on in this shape. A round brilliant has 57 facets arranged to return light straight back at the viewer; when the proportions drift, the stone goes flat in exactly the lighting where you will actually see it. An Excellent cut in a lower colour will out-perform a mediocre cut two colour grades higher, every time.
Two levers save real money on mined rounds. Buy just under the round weights: a 0.92ct faces up the same as a 1.00ct and costs noticeably less, because the price steps at the number, not at the millimetre. And do not dismiss faint fluorescence — it is discounted out of habit rather than out of any visible effect in most stones.
Every round here carries its original GIA or IGI report, and every one can be viewed in 360° before you commit.
Questions people ask before buying
Are these diamonds certified?
Yes. Every stone is graded by GIA, IGI or HRD, and the report number is shown on the stone's page so you can verify it directly with the laboratory. A stone certified by any other laboratory, or ungraded, cannot be bought here at all.
Does the price include a setting?
No. Loose diamonds and ring settings are priced separately, so you can pair any stone with any setting in a compatible shape. The ring builder shows the two together and the combined total before you order.
What should I prioritise when choosing?
Cut first — it is the only grade you can see across a room. Then clarity down to eye-clean, usually VS2 or SI1. Then colour: G or H reads white in platinum, I or J in yellow gold. Then buy just under a landmark weight, because 0.95 ct looks like 1.00 ct and costs less. The guide to the 4Cs explains the trade-offs in full.
How much is shipping?
Nothing. Every order ships free and fully insured, anywhere in the world, at any order value. Import duties and taxes outside the United States are the recipient's responsibility.
Can I return it?
Yes, within 30 days, unworn and in its original packaging with the certificate. The return leg is arranged and paid by you, and must be insured and tracked.
Is there a warranty?
A lifetime warranty against any manufacturing defect, for as long as you own the piece. Full detail on the FAQ page.