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

As of October 2026, 1.00 to 1.49ct lab grown cushion diamonds range from £131 GBP/ct to £3,918 GBP/ct, with an average of £494 GBP/ct.

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

As of October 2026, the lowest listed price is £131 GBP per carat and the highest is £3,918 GBP per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

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

There are 299,598 active lab grown cushion 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 cushion diamond?

Approximately 38% of these diamonds are available at multiple retailers, with an average price spread of 88% between the cheapest and most expensive listing of the same stone.

Lab Grown Cushion Diamonds, 1.00 to 1.49ct

Quick answer

As of October 2026, there are 299,598 listings of lab grown cushion diamonds between 1.00 to 1.49ct from at least 61 retailers. A typical stone in this range costs about £593 GBP in total, or £494 GBP per carat, and most listings sit between £131 GBP and £3,918 GBP per carat. About 38% of these stones are listed by more than one retailer, and the same stone is priced 88% apart on average between its cheapest and most expensive seller. The best value grade combination with real depth of stock is F to G VS1 at £351 GBP per carat across 14,645 listings. The same shape in natural form runs about £2,540 GBP per carat, roughly 5.1 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. Cushion lab grown stones in the index: 516 USD per carat, +6.9% 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 299,598 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$880	$887	$536	$502	$471	$479	$454	$464	-
F-G	$960	$888	$549	$482	$467	$479	$473	$568	-
H-I	-	-	$765	$594	$542	$615	$575	-	-
J-K	-	-	-	$670	$686	$915	$1,012	-	-
L-M	-	-	-	$411	$645	$704	-	-	-
N+	-	$1,011	$659	$594	$591	$577	$568	$762	$291

Price by Colour & Clarity

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

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	4,498	£662 GBP	100%
D-E	IF	6,586	£668 GBP	108%
D-E	SI1	1,423	£342 GBP	83%
D-E	SI2	137	£350 GBP	95%
D-E	VS1	71,737	£354 GBP	80%
D-E	VS2	16,632	£361 GBP	71%
D-E	VVS1	38,786	£404 GBP	97%
D-E	VVS2	91,849	£378 GBP	84%
F-G	FL	73	£722 GBP	95%
F-G	IF	371	£669 GBP	96%
F-G	SI1	663	£356 GBP	68%
F-G	SI2	25	£427 GBP	80%
F-G	VS1	14,645	£351 GBP	74%
F-G	VS2	5,073	£361 GBP	72%
F-G	VVS1	1,933	£413 GBP	82%
F-G	VVS2	11,983	£363 GBP	76%
H-I	SI1	46	£432 GBP	91%
H-I	VS1	816	£408 GBP	60%
H-I	VS2	395	£463 GBP	53%
H-I	VVS1	157	£575 GBP	56%
H-I	VVS2	440	£447 GBP	50%
J-K	SI1	15	£761 GBP	63%
J-K	VS1	39	£516 GBP	50%
J-K	VS2	12	£689 GBP	75%
J-K	VVS2	40	£504 GBP	86%
L-M	VS1	33	£485 GBP	43%
L-M	VS2	16	£530 GBP	32%
L-M	VVS2	21	£309 GBP	67%
N+	I	46	£219 GBP	83%
N+	IF	222	£761 GBP	118%
N+	SI1	998	£427 GBP	178%
N+	SI2	201	£573 GBP	218%
N+	VS1	12,384	£445 GBP	111%
N+	VS2	4,391	£435 GBP	112%
N+	VVS1	1,593	£496 GBP	110%
N+	VVS2	9,760	£447 GBP	110%
N+	other	1,559	£1,201 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