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

As of October 2026, 3.00 to 4.99ct lab grown marquise diamonds range from £103 GBP/ct to £5,560 GBP/ct, with an average of £643 GBP/ct.

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

As of October 2026, the lowest listed price is £103 GBP per carat and the highest is £5,560 GBP per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

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

There are 345,491 active lab grown marquise 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 marquise diamond?

Approximately 43% of these diamonds are available at multiple retailers, with an average price spread of 91% between the cheapest and most expensive listing of the same stone.

Lab Grown Marquise Diamonds, 3.00 to 4.99ct

Quick answer

As of October 2026, there are 345,491 listings of lab grown marquise diamonds between 3.00 to 4.99ct from at least 62 retailers. A typical stone in this range costs about £2,445 GBP in total, or £643 GBP per carat, and most listings sit between £103 GBP and £5,560 GBP per carat. About 43% of these stones are listed by more than one retailer, and the same stone is priced 91% 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 £348 GBP per carat across 53,161 listings. The same shape in natural form runs about £10,646 GBP per carat, roughly 16.5 times more.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise lab grown stones in the index: 485 USD per carat, -3.2% month on month. See the full index release

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

Last updated: October 2026

Browse 345,491 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$3,098	$2,246	$780	$561	$514	$505	$425	$325	-
F-G	$1,895	$1,180	$615	$463	$481	$504	$412	$429	-
H-I	-	$1,564	$1,387	$707	$572	$695	$309	-	-
J-K	-	-	-	$514	$779	-	-	-	-
L-M	-	-	-	$535	$553	-	-	-	-
N+	-	$2,240	$599	$460	$440	$440	$321	$292	$399

Price by Colour & Clarity

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

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	3,374	£2,331 GBP	77%
D-E	IF	4,894	£1,690 GBP	93%
D-E	SI1	520	£320 GBP	112%
D-E	SI2	29	£245 GBP	87%
D-E	VS1	58,800	£387 GBP	115%
D-E	VS2	13,170	£380 GBP	102%
D-E	VVS1	36,339	£587 GBP	103%
D-E	VVS2	92,344	£422 GBP	112%
F-G	FL	39	£1,426 GBP	91%
F-G	IF	313	£888 GBP	87%
F-G	SI1	648	£310 GBP	105%
F-G	SI2	45	£323 GBP	70%
F-G	VS1	43,594	£362 GBP	109%
F-G	VS2	9,907	£379 GBP	97%
F-G	VVS1	6,504	£463 GBP	109%
F-G	VVS2	53,161	£348 GBP	121%
H-I	IF	25	£1,177 GBP	97%
H-I	SI1	16	£233 GBP	13%
H-I	VS1	1,432	£430 GBP	94%
H-I	VS2	408	£523 GBP	88%
H-I	VVS1	194	£1,044 GBP	67%
H-I	VVS2	1,349	£532 GBP	108%
J-K	VS1	12	£587 GBP	69%
J-K	VVS2	34	£387 GBP	83%
L-M	VS1	35	£416 GBP	61%
L-M	VVS2	49	£403 GBP	70%
N+	I	11	£300 GBP	54%
N+	IF	10	£1,685 GBP	6%
N+	SI1	575	£242 GBP	110%
N+	SI2	39	£220 GBP	123%
N+	VS1	7,810	£331 GBP	106%
N+	VS2	3,387	£331 GBP	108%
N+	VVS1	279	£451 GBP	102%
N+	VVS2	5,708	£346 GBP	104%
N+	other	437	£1,627 GBP	19%

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