Lab Grown Diamond Market
As of September 2026, there are 20,601,057 lab grown diamond listings available across retailers worldwide. The average price per carat is £980 GBP. Prices have decreased by 7.9% over the past 30 days.
Last updated: September 2026
Available by shape
Listing counts across the top 10 most-stocked shapes for this origin.
Round
7.9M
Oval
3.3M
Pear
2.1M
Emerald
1.5M
Cushion
1.4M
Radiant
1.3M
Marquise
1.3M
Princess
936K
Heart
491K
Asscher
298K
Price by carat bucket
Average price per carat rises sharply at the 1.00, 2.00 and 3.00ct marks.
0.20-0.29ct
$1.1K
0.30-0.49ct
$1.1K
0.50-0.74ct
$1.1K
0.75-0.99ct
$1.1K
1.00-1.24ct
$966
1.25-1.49ct
$894
1.50-1.99ct
$1.2K
2.00-2.49ct
$1.4K
2.50-2.99ct
$1.3K
3.00-3.99ct
$1.5K
4.00-4.99ct
$1.6K
5.00-9.99ct
$1.8K
10.00+ct
$1.4K
unknownct
$1.4K
Available Shapes
Round
7,902,544 listings
Avg: £1,459 GBP/ct
Oval
3,251,160 listings
Avg: £1,178 GBP/ct
Pear
2,098,761 listings
Avg: £1,012 GBP/ct
Emerald
1,522,373 listings
Avg: £994 GBP/ct
Cushion
1,385,271 listings
Avg: £902 GBP/ct
Radiant
1,326,362 listings
Avg: £903 GBP/ct
Marquise
1,259,209 listings
Avg: £898 GBP/ct
Princess
935,787 listings
Avg: £924 GBP/ct
Heart
491,095 listings
Avg: £895 GBP/ct
Asscher
298,233 listings
Avg: £866 GBP/ct
Other
102,355 listings
Avg: £592 GBP/ct
Trillion
18,532 listings
Avg: £560 GBP/ct
Baguette
7,799 listings
Avg: £417 GBP/ct
Sq_radiant
1,576 listings
Avg: £362 GBP/ct
By Carat Weight
| Carat Range | Listings | Avg Price/ct |
|---|---|---|
| 0.20-0.29 | 93,590 | £831 GBP |
| 0.30-0.49 | 819,661 | £874 GBP |
| 0.50-0.74 | 1,303,148 | £827 GBP |
| 0.75-0.99 | 832,091 | £836 GBP |
| 1.00-1.24 | 3,935,308 | £760 GBP |
| 1.25-1.49 | 897,572 | £704 GBP |
| 1.50-1.99 | 3,733,152 | £941 GBP |
| 2.00-2.49 | 2,821,445 | £1,064 GBP |
| 2.50-2.99 | 1,492,838 | £1,034 GBP |
| 3.00-3.99 | 2,184,578 | £1,180 GBP |
| 4.00-4.99 | 1,176,141 | £1,298 GBP |
| 5.00-9.99 | 1,132,303 | £1,389 GBP |
| 10.00+ | 161,367 | £1,122 GBP |
| unknown | 17,863 | £1,079 GBP |