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

As of October 2026, 5.00ct+ lab grown cushion diamonds range from £91 GBP/ct to £6,519 GBP/ct, with an average of £684 GBP/ct.

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

As of October 2026, the lowest listed price is £91 GBP per carat and the highest is £6,519 GBP per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

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

There are 200,923 active lab grown cushion listings between 5.00ct+ across 100+ retailers in the Carat Hunter index, refreshed daily.

How much can I save by comparing retailers for a 5.00ct+ lab grown cushion diamond?

Approximately 43% of these diamonds are available at multiple retailers, with an average price spread of 96% between the cheapest and most expensive listing of the same stone.

Lab Grown Cushion Diamonds, 5.00ct+

Quick answer

As of October 2026, there are 200,923 listings of lab grown cushion diamonds between 5.00ct+ from at least 58 retailers. A typical stone in this range costs about £4,102 GBP in total, or £684 GBP per carat, and most listings sit between £91 GBP and £6,519 GBP per carat. About 43% of these stones are listed by more than one retailer, and the same stone is priced 96% apart on average between its cheapest and most expensive seller. The best value grade combination with real depth of stock is F to G VS2 at £345 GBP per carat across 6,426 listings. The same shape in natural form runs about £13,678 GBP per carat, roughly 20.0 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 200,923 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$3,140	$2,744	$1,116	$602	$578	$552	$387	$305	-
F-G	$4,108	$1,967	$909	$504	$476	$459	$310	$268	-
H-I	-	-	$1,520	$583	$525	$621	$3,202	-	-
J-K	-	-	$1,604	$499	$660	-	$961	-	-
L-M	-	-	-	$683	$637	-	-	-	-
N+	-	$1,847	$894	$548	$571	$519	$394	$374	$339

Price by Colour & Clarity

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

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	3,749	£2,363 GBP	97%
D-E	IF	3,260	£2,065 GBP	96%
D-E	SI1	371	£291 GBP	118%
D-E	SI2	35	£230 GBP	107%
D-E	VS1	31,683	£435 GBP	97%
D-E	VS2	4,691	£416 GBP	95%
D-E	VVS1	6,230	£840 GBP	87%
D-E	VVS2	49,243	£453 GBP	98%
F-G	FL	33	£3,092 GBP	58%
F-G	IF	75	£1,480 GBP	87%
F-G	SI1	504	£233 GBP	129%
F-G	SI2	23	£202 GBP	116%
F-G	VS1	28,299	£358 GBP	95%
F-G	VS2	6,426	£345 GBP	99%
F-G	VVS1	1,396	£684 GBP	93%
F-G	VVS2	32,778	£379 GBP	99%
H-I	SI1	11	£2,410 GBP	75%
H-I	VS1	1,817	£395 GBP	93%
H-I	VS2	598	£467 GBP	103%
H-I	VVS1	152	£1,144 GBP	102%
H-I	VVS2	914	£439 GBP	135%
J-K	SI1	12	£723 GBP	279%
J-K	VS1	63	£497 GBP	50%
J-K	VVS1	17	£1,207 GBP	82%
J-K	VVS2	22	£375 GBP	83%
L-M	VS1	24	£479 GBP	22%
L-M	VVS2	18	£514 GBP	37%
N+	I	19	£255 GBP	65%
N+	IF	10	£1,390 GBP	81%
N+	SI1	1,024	£296 GBP	111%
N+	SI2	98	£282 GBP	110%
N+	VS1	13,515	£430 GBP	99%
N+	VS2	7,355	£391 GBP	102%
N+	VVS1	96	£673 GBP	81%
N+	VVS2	5,687	£412 GBP	95%
N+	other	675	£1,705 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