How much does a 1.00 to 1.49ct lab grown marquise diamond cost?

As of November 2026, 1.00 to 1.49ct lab grown marquise diamonds range from £82 GBP/ct to £2,639 GBP/ct, with an average of £451 GBP/ct.

What is the price range for 1.00 to 1.49ct lab grown marquise diamonds?

As of November 2026, the lowest listed price is £82 GBP per carat and the highest is £2,639 GBP per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

How many 1.00 to 1.49ct lab grown marquise diamonds are available?

There are 421,263 active lab grown marquise listings between 1.00 to 1.49ct across 100+ retailers in the Carat Hunter index, refreshed daily.

How much can I save by comparing retailers for a 1.00 to 1.49ct lab grown marquise diamond?

Approximately 42% of these diamonds are available at multiple retailers, with an average price spread of 95% between the cheapest and most expensive listing of the same stone.

Lab Grown Marquise Diamonds, 1.00 to 1.49ct

Quick answer

As of November 2026, there are 421,263 listings of lab grown marquise diamonds between 1.00 to 1.49ct from at least 58 retailers. A typical stone in this range costs about £541 GBP in total, or £451 GBP per carat, and most listings sit between £82 GBP and £2,639 GBP per carat. About 42% of these stones are listed by more than one retailer, and the same stone is priced 95% apart on average between its cheapest and most expensive seller. The best value grade combination with real depth of stock is D to E VS1 at £360 GBP per carat across 77,866 listings. The same shape in natural form runs about £3,353 GBP per carat, roughly 7.4 times more.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise lab grown stones in the index: 505 USD per carat, +1.6% 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: November 2026

Browse 421,263 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$737	$744	$540	$493	$482	$498	$392	$312	-
F-G	$686	$609	$537	$528	$484	$463	$405	-	-
H-I	-	-	$781	$622	$722	$690	$845	-	-
J-K	-	-	-	$742	$486	-	-	-	-
L-M	-	-	-	$624	$518	-	-	-	-
N+	-	$1,277	$618	$485	$463	$448	$519	$381	$240

Price by Colour & Clarity

Average price per carat for 1.00 to 1.49ct lab grown marquise diamonds by colour and clarity grade.

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	28,901	£550 GBP	117%
D-E	IF	32,188	£555 GBP	112%
D-E	SI1	1,174	£292 GBP	75%
D-E	SI2	40	£233 GBP	87%
D-E	VS1	77,866	£360 GBP	73%
D-E	VS2	17,803	£371 GBP	58%
D-E	VVS1	62,771	£402 GBP	92%
D-E	VVS2	122,667	£368 GBP	88%
F-G	FL	40	£512 GBP	112%
F-G	IF	461	£454 GBP	114%
F-G	SI1	453	£302 GBP	64%
F-G	VS1	15,147	£361 GBP	66%
F-G	VS2	3,571	£345 GBP	69%
F-G	VVS1	4,451	£400 GBP	78%
F-G	VVS2	20,912	£393 GBP	65%
H-I	SI1	164	£630 GBP	141%
H-I	VS1	1,316	£538 GBP	104%
H-I	VS2	395	£515 GBP	72%
H-I	VVS1	145	£583 GBP	51%
H-I	VVS2	647	£464 GBP	63%
J-K	VS1	55	£363 GBP	86%
J-K	VVS2	38	£553 GBP	124%
L-M	VS1	20	£386 GBP	91%
L-M	VVS2	27	£465 GBP	53%
N+	I	69	£179 GBP	160%
N+	IF	191	£952 GBP	87%
N+	SI1	813	£387 GBP	157%
N+	SI2	188	£284 GBP	125%
N+	VS1	12,051	£345 GBP	131%
N+	VS2	4,194	£334 GBP	131%
N+	VVS1	783	£461 GBP	130%
N+	VVS2	10,343	£362 GBP	124%
N+	other	1,379	£1,087 GBP	23%

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