Cushion diamond prices.
The cushion cut blends a square shape with rounded corners, resembling a pillow. Available in square and rectangular proportions with either brilliant or modified brilliant faceting. Our analytics are based on 103,734 cushion diamonds currently on the global market — 71,961 lab-grown and 31,773 natural. Cushion is the 5th most popular shape, representing 6.6% of all diamonds in our dataset.
Natural
£4,794
per carat
Lab-grown
£904
per carat
81.1%
Savings
The average lab-grown cushion diamond is priced at £904 per carat, while natural cushion diamonds average £4,794 per carat — a 81.1% difference. This means your 1ct natural cushion could trade for a 5.3ct lab-grown upgrade at equivalent value.
Cushion price matrix.
Price per carat in GBP, based on 71,961 cushion diamonds.
| FL | IF | VVS1 | VVS2 | VS1 | VS2 | SI1 | SI2 | I1 | |
|---|---|---|---|---|---|---|---|---|---|
| D | £2.5k | £1.6k | £966 | £824 | £758 | £746 | £776 | £873 | — |
| E | £2.6k | £1.5k | £887 | £758 | £730 | £721 | £692 | £1.0k | — |
| F | £2.7k | £1.4k | £860 | £705 | £755 | £748 | £704 | £884 | — |
| G | — | £1.7k | £822 | £755 | £906 | £1.0k | £1.0k | £830 | — |
| H | — | — | £840 | £725 | £1.2k | £1.3k | £1.4k | £1.1k | — |
| I | — | — | £892 | £791 | £820 | £1.4k | £2.4k | £2.1k | — |
| J | — | — | — | £744 | £1.5k | £2.0k | £2.2k | £2.1k | — |
| K | — | — | — | £1.2k | £2.0k | £2.5k | £1.8k | £2.9k | — |
Among cushion diamonds, E/SI1 offers the best value at £692/ct, while K/SI2 commands the highest premium at £2,946/ct.
Cushion distribution.
Colour and clarity breakdown for cushion diamonds.
Frequently asked.
What is the average price of a cushion diamond per carat in the UK?
Based on our dataset of 103,734 cushion diamonds, the average lab-grown cushion costs £904 per carat, while natural cushion diamonds average £4,794 per carat in GBP.
Are lab-grown cushion diamonds cheaper than natural?
Yes. Lab-grown cushion diamonds are 81.1% cheaper on average — £904/ct compared to £4,794/ct for natural. This means you could upgrade from a 1ct natural to a 5.3ct lab-grown for the same price.
How popular are cushion diamonds?
Cushion diamonds represent 6.6% of all diamonds in our dataset, making them the 5th most popular shape.
What is the best value colour-clarity combination for cushion diamonds?
E colour with SI1 clarity offers the best value at £692 per carat for cushion diamonds.
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