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

As of October 2026, 1.00 to 1.49ct lab grown radiant diamonds range from £118 GBP/ct to £12,543 GBP/ct, with an average of £474 GBP/ct.

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

As of October 2026, the lowest listed price is £118 GBP per carat and the highest is £12,543 GBP per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

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

There are 359,244 active lab grown radiant 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 radiant diamond?

Approximately 45% 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, 1.00 to 1.49ct

Quick answer

As of October 2026, there are 359,244 listings of lab grown radiant diamonds between 1.00 to 1.49ct from at least 61 retailers. A typical stone in this range costs about £569 GBP in total, or £474 GBP per carat, and most listings sit between £118 GBP and £12,543 GBP per carat. About 45% 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 VS2 at £339 GBP per carat across 7,875 listings. The same shape in natural form runs about £2,798 GBP per carat, roughly 5.9 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. Radiant lab grown stones in the index: 474 USD per carat, -2.1% 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 359,244 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$741	$582	$490	$486	$471	$453	$411	$601	$340
F-G	$767	$607	$546	$471	$460	$452	$437	$428	-
H-I	-	$1,313	$673	$492	$460	$506	$769	-	-
J-K	-	-	-	$598	$715	$910	$483	$908	-
L-M	-	-	-	$550	-	-	-	-	-
N+	$1,121	$1,019	$572	$469	$463	$440	$508	$566	$1,226

Price by Colour & Clarity

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

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	7,785	£557 GBP	107%
D-E	I	23	£255 GBP	119%
D-E	IF	16,400	£437 GBP	116%
D-E	SI1	2,326	£309 GBP	75%
D-E	SI2	146	£452 GBP	83%
D-E	VS1	70,345	£354 GBP	75%
D-E	VS2	20,133	£340 GBP	78%
D-E	VVS1	42,583	£368 GBP	107%
D-E	VVS2	80,814	£365 GBP	89%
F-G	FL	96	£576 GBP	125%
F-G	IF	1,103	£456 GBP	112%
F-G	SI1	1,296	£328 GBP	75%
F-G	SI2	86	£322 GBP	105%
F-G	VS1	28,935	£346 GBP	77%
F-G	VS2	7,875	£339 GBP	72%
F-G	VVS1	2,749	£410 GBP	79%
F-G	VVS2	23,806	£354 GBP	76%
H-I	IF	50	£986 GBP	82%
H-I	SI1	98	£578 GBP	77%
H-I	VS1	2,128	£346 GBP	71%
H-I	VS2	746	£380 GBP	64%
H-I	VVS1	250	£506 GBP	66%
H-I	VVS2	1,472	£370 GBP	75%
J-K	SI1	14	£363 GBP	133%
J-K	SI2	12	£682 GBP	85%
J-K	VS1	54	£537 GBP	119%
J-K	VS2	46	£684 GBP	86%
J-K	VVS2	75	£449 GBP	103%
L-M	VVS2	13	£413 GBP	59%
N+	FL	51	£842 GBP	92%
N+	I	32	£921 GBP	1176%
N+	IF	402	£765 GBP	123%
N+	SI1	1,583	£382 GBP	141%
N+	SI2	320	£425 GBP	181%
N+	VS1	19,492	£348 GBP	127%
N+	VS2	7,540	£331 GBP	124%
N+	VVS1	1,516	£430 GBP	110%
N+	VVS2	14,997	£352 GBP	123%
N+	other	1,852	£1,098 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