How much does a 5.00ct+ lab grown radiant diamond cost?

As of September 2026, 5.00ct+ lab grown radiant diamonds range from $225 NZD/ct to $30,982 NZD/ct, with an average of $2,510 NZD/ct.

What is the price range for 5.00ct+ lab grown radiant diamonds?

As of September 2026, the lowest listed price is $225 NZD per carat and the highest is $30,982 NZD per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

How many 5.00ct+ lab grown radiant diamonds are available?

There are 134,599 active lab grown radiant listings between 5.00ct+ across 100+ retailers in the Carat Hunter index, refreshed daily.

Lab Grown Radiant Diamonds, 5.00ct+

Quick answer

As of September 2026, there are 134,599 lab grown radiant diamonds between 5.00ct+ listed by at least 48 retailers. A typical stone in this range costs about $15,060 NZD in total, or $2,510 NZD per carat, and most listings sit between $225 NZD and $30,982 NZD per carat. The best value grade combination with real depth of stock is F to G VVS2 at $728 NZD per carat across 28,550 listings. The same shape in natural form runs about $31,717 NZD per carat, roughly 12.6 times more.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Radiant lab grown stones in the index: 473 USD per carat, -12.5% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Browse 134,599 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2
D-E	$3,499	$3,179	$1,278	$534	$539	$527	$302	$317
F-G	$3,360	$2,015	$971	$420	$436	$486	$341	$525
H-I	-	$1,714	$1,309	$538	$619	$479	$471	-
J-K	-	-	-	$668	$6,618	$1,233	$14K	$13K
N+	-	-	$763	$608	$581	$530	$419	$321

Price by Colour & Clarity

Average price per carat for 5.00ct+ lab grown radiant diamonds by colour and clarity grade.

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	1,171	$6,062 NZD	109%
D-E	IF	1,086	$5,508 NZD	96%
D-E	SI1	228	$524 NZD	158%
D-E	SI2	21	$549 NZD	171%
D-E	VS1	20,431	$934 NZD	108%
D-E	VS2	3,034	$913 NZD	126%
D-E	VVS1	4,300	$2,215 NZD	109%
D-E	VVS2	30,969	$926 NZD	114%
F-G	FL	20	$5,821 NZD	110%
F-G	IF	148	$3,491 NZD	94%
F-G	SI1	434	$590 NZD	147%
F-G	SI2	16	$910 NZD	161%
F-G	VS1	23,257	$756 NZD	111%
F-G	VS2	4,323	$843 NZD	113%
F-G	VVS1	1,005	$1,683 NZD	101%
F-G	VVS2	28,550	$728 NZD	125%
H-I	IF	23	$2,970 NZD	61%
H-I	SI1	40	$816 NZD	140%
H-I	VS1	1,082	$1,072 NZD	109%
H-I	VS2	261	$830 NZD	198%
H-I	VVS1	11	$2,267 NZD	55%
H-I	VVS2	727	$932 NZD	113%
J-K	SI1	17	$24,265 NZD	44%
J-K	SI2	12	$22,542 NZD	42%
J-K	VS1	10	$11,466 NZD	160%
J-K	VS2	37	$2,136 NZD	26%
J-K	VVS2	10	$1,157 NZD	48%
N+	SI1	474	$725 NZD	93%
N+	SI2	37	$557 NZD	113%
N+	VS1	5,908	$1,006 NZD	104%
N+	VS2	2,997	$918 NZD	102%
N+	VVS1	50	$1,322 NZD	96%
N+	VVS2	2,854	$1,053 NZD	102%
N+	other	1,056	$3,726 NZD	10%

Explore by Specification

D FL D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 D SI2 E FL E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 E SI2 F FL F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 F SI2 G FL G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 G SI2 H FL H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 H SI2 I FL I IF I VVS1 I VVS2 I VS1 I VS2 I SI1 I SI2 J FL J IF J VVS1 J VVS2 J VS1 J VS2 J SI1 J SI2