Lab Grown Diamond Market
As of September 2026, there are 19,372,058 lab grown diamond listings available across retailers worldwide. The average price per carat is $2,090 NZD. 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
7.3M
Oval
3.0M
Pear
2.0M
Emerald
1.5M
Cushion
1.3M
Radiant
1.3M
Marquise
1.2M
Princess
911K
Heart
453K
Asscher
276K
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
$900
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
$1.7K
5.00-9.99ct
$1.8K
10.00+ct
$1.4K
unknownct
$1.4K
Available Shapes
Round
7,267,686 listings
Avg: $3,176 NZD/ct
Oval
3,045,304 listings
Avg: $2,531 NZD/ct
Pear
2,021,067 listings
Avg: $2,172 NZD/ct
Emerald
1,453,732 listings
Avg: $2,099 NZD/ct
Cushion
1,328,456 listings
Avg: $1,911 NZD/ct
Radiant
1,290,071 listings
Avg: $1,899 NZD/ct
Marquise
1,197,026 listings
Avg: $1,894 NZD/ct
Princess
910,676 listings
Avg: $1,957 NZD/ct
Heart
452,862 listings
Avg: $1,875 NZD/ct
Asscher
275,998 listings
Avg: $1,859 NZD/ct
Other
101,451 listings
Avg: $1,244 NZD/ct
Trillion
18,470 listings
Avg: $1,183 NZD/ct
Baguette
7,693 listings
Avg: $882 NZD/ct
Sq_radiant
1,566 listings
Avg: $758 NZD/ct
By Carat Weight
| Carat Range | Listings | Avg Price/ct |
|---|---|---|
| 0.20-0.29 | 88,666 | $1,775 NZD |
| 0.30-0.49 | 789,340 | $1,849 NZD |
| 0.50-0.74 | 1,264,182 | $1,757 NZD |
| 0.75-0.99 | 806,090 | $1,777 NZD |
| 1.00-1.24 | 3,649,740 | $1,610 NZD |
| 1.25-1.49 | 864,192 | $1,500 NZD |
| 1.50-1.99 | 3,540,053 | $2,029 NZD |
| 2.00-2.49 | 2,633,463 | $2,280 NZD |
| 2.50-2.99 | 1,412,514 | $2,209 NZD |
| 3.00-3.99 | 2,012,383 | $2,479 NZD |
| 4.00-4.99 | 1,078,890 | $2,783 NZD |
| 5.00-9.99 | 1,051,700 | $3,030 NZD |
| 10.00+ | 162,962 | $2,366 NZD |
| unknown | 17,883 | $2,285 NZD |