Round diamond prices.
The round brilliant cut is the most popular diamond shape, accounting for over 70% of all diamonds sold worldwide. Known for its exceptional fire and brilliance, it features 57-58 facets optimised for maximum light return. Our analytics are based on 664,018 round diamonds currently on the global market — 338,101 lab-grown and 325,917 natural. Round is the 1st most popular shape, representing 46.4% of all diamonds in our dataset.
Natural
£3,527
per carat
Lab-grown
£804
per carat
77.2%
Savings
The average lab-grown round diamond is priced at £804 per carat, while natural round diamonds average £3,527 per carat — a 77.2% difference. This means your 1ct natural round could trade for a 4.4ct lab-grown upgrade at equivalent value.
Round price matrix.
Price per carat in GBP, based on 338,101 round diamonds.
| FL | IF | VVS1 | VVS2 | VS1 | VS2 | SI1 | SI2 | I1 | |
|---|---|---|---|---|---|---|---|---|---|
| D | £1.6k | £1.1k | £947 | £889 | £840 | £791 | £942 | £1.5k | £2.4k |
| E | £1.3k | £956 | £787 | £661 | £681 | £743 | £942 | £1.4k | £981 |
| F | £1.5k | £920 | £661 | £540 | £643 | £696 | £691 | £953 | £860 |
| G | £1.0k | £912 | £577 | £569 | £742 | £685 | £735 | £1.2k | £1.1k |
| H | — | £1.2k | £600 | £603 | £658 | £658 | £1.2k | £1.8k | £1.6k |
| I | — | £706 | £789 | £1.1k | £1.4k | £1.7k | £2.2k | £2.1k | £1.3k |
| J | — | — | £1.2k | £2.0k | £1.7k | £2.1k | £2.0k | £2.0k | £1.6k |
| K | — | — | — | £3.0k | £3.0k | £3.0k | £1.8k | £2.8k | £2.2k |
Among round diamonds, F/VVS2 offers the best value at £540/ct, while K/VS2 commands the highest premium at £3,045/ct.
Round distribution.
Colour and clarity breakdown for round diamonds.
Frequently asked.
What is the average price of a round diamond per carat in the UK?
Based on our dataset of 664,018 round diamonds, the average lab-grown round costs £804 per carat, while natural round diamonds average £3,527 per carat in GBP.
Are lab-grown round diamonds cheaper than natural?
Yes. Lab-grown round diamonds are 77.2% cheaper on average — £804/ct compared to £3,527/ct for natural. This means you could upgrade from a 1ct natural to a 4.4ct lab-grown for the same price.
How popular are round diamonds?
Round diamonds represent 46.4% of all diamonds in our dataset, making them the 1st most popular shape.
What is the best value colour-clarity combination for round diamonds?
F colour with VVS2 clarity offers the best value at £540 per carat for round diamonds.
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