How much does a 3.00 to 4.99ct lab grown radiant diamond cost?

As of September 2026, 3.00 to 4.99ct lab grown radiant diamonds range from £127 GBP/ct to £12,356 GBP/ct, with an average of £1,025 GBP/ct.

What is the price range for 3.00 to 4.99ct lab grown radiant diamonds?

As of September 2026, the lowest listed price is £127 GBP per carat and the highest is £12,356 GBP per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

How many 3.00 to 4.99ct lab grown radiant diamonds are available?

There are 376,279 active lab grown radiant listings between 3.00 to 4.99ct across 100+ retailers in the Carat Hunter index, refreshed daily.

How much can I save by comparing retailers for a 3.00 to 4.99ct lab grown radiant diamond?

Approximately 17% of these diamonds are available at multiple retailers, with an average price spread of 111% between the cheapest and most expensive listing of the same stone.

Lab Grown Radiant Diamonds, 3.00 to 4.99ct

Quick answer

As of September 2026, there are 376,279 lab grown radiant diamonds between 3.00 to 4.99ct listed by at least 53 retailers. A typical stone in this range costs about £3,894 GBP in total, or £1,025 GBP per carat, and most listings sit between £127 GBP and £12,356 GBP per carat. About 17% of these stones are listed by more than one retailer, and the same stone is priced 111% apart on average between its cheapest and most expensive seller. The best value grade combination with real depth of stock is F to G VVS2 at £325 GBP per carat across 34,117 listings. The same shape in natural form runs about £8,786 GBP per carat, roughly 8.6 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 376,279 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$2,208	$1,531	$1,052	$498	$471	$487	$366	$330	-
F-G	$2,197	$1,151	$664	$439	$447	$442	$375	$959	-
H-I	-	$1,011	$1,467	$436	$438	$889	$748	$13K	-
J-K	-	-	-	-	$982	$1,287	$1,422	$3,449	$6,201
N+	-	$2,425	$575	$507	$472	$449	$378	$333	-

Price by Colour & Clarity

Average price per carat for 3.00 to 4.99ct lab grown radiant diamonds by colour and clarity grade.

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	13,579	£1,635 GBP	127%
D-E	IF	21,730	£1,134 GBP	123%
D-E	SI1	688	£271 GBP	241%
D-E	SI2	44	£245 GBP	197%
D-E	VS1	71,574	£348 GBP	102%
D-E	VS2	10,714	£360 GBP	138%
D-E	VVS1	36,478	£779 GBP	131%
D-E	VVS2	125,152	£369 GBP	109%
F-G	FL	73	£1,626 GBP	105%
F-G	IF	900	£852 GBP	111%
F-G	SI1	687	£278 GBP	163%
F-G	SI2	29	£710 GBP	149%
F-G	VS1	25,461	£331 GBP	130%
F-G	VS2	5,467	£327 GBP	152%
F-G	VVS1	2,992	£492 GBP	163%
F-G	VVS2	34,117	£325 GBP	117%
F-G	other	20	£354 GBP	130%
H-I	IF	25	£748 GBP	90%
H-I	SI1	168	£554 GBP	121%
H-I	SI2	21	£9,734 GBP	63%
H-I	VS1	2,324	£324 GBP	174%
H-I	VS2	693	£658 GBP	93%
H-I	VVS1	155	£1,086 GBP	43%
H-I	VVS2	950	£323 GBP	190%
J-K	I	45	£4,591 GBP	4%
J-K	SI1	26	£1,052 GBP	58%
J-K	SI2	20	£2,553 GBP	173%
J-K	VS1	45	£727 GBP	132%
J-K	VS2	70	£953 GBP	45%
N+	IF	79	£1,795 GBP	2%
N+	SI1	606	£280 GBP	86%
N+	SI2	68	£247 GBP	92%
N+	VS1	9,762	£349 GBP	87%
N+	VS2	4,351	£333 GBP	86%
N+	VVS1	245	£426 GBP	83%
N+	VVS2	5,387	£375 GBP	85%
N+	other	1,534	£1,513 GBP	12%

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