Lab Grown Round Diamonds
As of April 2026, there are 5,549,108 lab grown round diamonds available. Prices range from ￥27,472 JPY/ct to ￥4,478,990 JPY/ct, with an average of ￥301,212 JPY/ct.
Last updated: April 2026
By Carat Weight
Price Distribution
LowHigh
| Color | FL | IF | VVS1 | VVS2 | VS1 | VS2 | SI1 | SI2 | I |
|---|---|---|---|---|---|---|---|---|---|
| D-E | $3,775 | $1,587 | $988 | $675 | $668 | $726 | $839 | $1,822 | $3,033 |
| F-G | $3,635 | $1,659 | $1,244 | $912 | $849 | $1,010 | $1,014 | $2,584 | $2,559 |
| H-I | $1,377 | $3,772 | $2,287 | $1,089 | $1,174 | $1,574 | $2,342 | $4,055 | $2,825 |
| J-K | $1,295 | $4,272 | $4,024 | $2,682 | $1,925 | $2,190 | $2,705 | $3,061 | $4,883 |
| L-M | - | $3,760 | $3,318 | $3,479 | $2,615 | $2,725 | $2,076 | $2,137 | $1,574 |
| N+ | - | $2,769 | $967 | $749 | $751 | $827 | $897 | $1,268 | $797 |
By Carat Weight
0.20-0.29
77,258 listings
Avg: ￥166,558 JPY/ct
0.30-0.49
529,107 listings
Avg: ￥169,664 JPY/ct
0.50-0.74
613,103 listings
Avg: ￥192,998 JPY/ct
0.75-0.99
198,755 listings
Avg: ￥246,839 JPY/ct
1.00-1.24
901,209 listings
Avg: ￥257,136 JPY/ct
1.25-1.49
242,165 listings
Avg: ￥216,262 JPY/ct
1.50-1.99
944,577 listings
Avg: ￥276,889 JPY/ct
2.00-2.49
805,630 listings
Avg: ￥355,050 JPY/ct
2.50-2.99
339,540 listings
Avg: ￥403,639 JPY/ct
3.00-3.99
514,647 listings
Avg: ￥450,651 JPY/ct
4.00-4.99
180,629 listings
Avg: ￥629,313 JPY/ct
5.00-9.99
179,585 listings
Avg: ￥407,778 JPY/ct
10.00+
11,551 listings
Avg: ￥131,167 JPY/ct
unknown
11,352 listings
Avg: ￥262,167 JPY/ct
Price by Color & Clarity
| Color | Clarity | Listings | Avg Price/ct |
|---|---|---|---|
| D-E | FL | 16,732 | ￥563,402 JPY |
| D-E | I | 7,143 | ￥452,733 JPY |
| D-E | IF | 151,492 | ￥236,801 JPY |
| D-E | SI1 | 63,870 | ￥125,164 JPY |
| D-E | SI2 | 19,585 | ￥271,955 JPY |
| D-E | VS1 | 1,262,061 | ￥99,646 JPY |
| D-E | VS2 | 328,880 | ￥108,385 JPY |
| D-E | VVS1 | 488,271 | ￥147,440 JPY |
| D-E | VVS2 | 1,662,264 | ￥100,762 JPY |
| F-G | FL | 182 | ￥542,487 JPY |
| F-G | I | 10,189 | ￥381,881 JPY |
| F-G | IF | 25,041 | ￥247,591 JPY |
| F-G | SI1 | 42,514 | ￥151,278 JPY |
| F-G | SI2 | 24,017 | ￥385,633 JPY |
| F-G | VS1 | 356,436 | ￥126,790 JPY |
| F-G | VS2 | 123,556 | ￥150,811 JPY |
| F-G | VVS1 | 68,565 | ￥185,724 JPY |
| F-G | VVS2 | 364,469 | ￥136,085 JPY |
| H-I | FL | 26 | ￥205,575 JPY |
| H-I | I | 8,612 | ￥421,714 JPY |
| H-I | IF | 15,319 | ￥563,024 JPY |
| H-I | SI1 | 40,792 | ￥349,608 JPY |
| H-I | SI2 | 25,875 | ￥605,253 JPY |
| H-I | VS1 | 64,969 | ￥175,282 JPY |
| H-I | VS2 | 45,889 | ￥234,899 JPY |
| H-I | VVS1 | 35,177 | ￥341,293 JPY |
| H-I | VVS2 | 52,048 | ￥162,526 JPY |
| J-K | FL | 12 | ￥193,224 JPY |
| J-K | I | 5,895 | ￥728,862 JPY |
| J-K | IF | 6,478 | ￥637,580 JPY |
| J-K | SI1 | 23,281 | ￥403,801 JPY |
| J-K | SI2 | 14,754 | ￥456,933 JPY |
| J-K | VS1 | 31,934 | ￥287,321 JPY |
| J-K | VS2 | 25,065 | ￥326,881 JPY |
| J-K | VVS1 | 13,971 | ￥600,632 JPY |
| J-K | VVS2 | 17,765 | ￥400,359 JPY |
| L-M | I | 1,803 | ￥234,857 JPY |
| L-M | IF | 1,850 | ￥561,162 JPY |
| L-M | SI1 | 6,604 | ￥309,816 JPY |
| L-M | SI2 | 4,747 | ￥318,905 JPY |
| L-M | VS1 | 5,091 | ￥390,355 JPY |
| L-M | VS2 | 5,264 | ￥406,643 JPY |
| L-M | VVS1 | 4,815 | ￥495,157 JPY |
| L-M | VVS2 | 4,521 | ￥519,284 JPY |
| N+ | I | 1,869 | ￥119,000 JPY |
| N+ | IF | 469 | ￥413,319 JPY |
| N+ | SI1 | 5,866 | ￥133,908 JPY |
| N+ | SI2 | 2,548 | ￥189,290 JPY |
| N+ | VS1 | 26,786 | ￥112,135 JPY |
| N+ | VS2 | 13,739 | ￥123,363 JPY |
| N+ | VVS1 | 2,992 | ￥144,400 JPY |
| N+ | VVS2 | 17,005 | ￥111,858 JPY |
| N+ | other | 10 | ￥171,782 JPY |