How much does a 5.00ct+ natural marquise diamond cost?

As of September 2026, 5.00ct+ natural marquise diamonds range from £324 GBP/ct to £90,555 GBP/ct, with an average of £20,631 GBP/ct.

What is the price range for 5.00ct+ natural marquise diamonds?

As of September 2026, the lowest listed price is £324 GBP per carat and the highest is £90,555 GBP per carat. The spread reflects differences in colour, clarity, cut and retailer pricing.

How many 5.00ct+ natural marquise diamonds are available?

There are 654 active natural marquise 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+ natural marquise diamond?

Approximately 56% of these diamonds are available at multiple retailers, with an average price spread of 44% between the cheapest and most expensive listing of the same stone.

Natural Marquise Diamonds, 5.00ct+

Quick answer

As of September 2026, there are 654 natural marquise diamonds between 5.00ct+ listed by at least 30 retailers. A typical stone in this range costs about £123,785 GBP in total, or £20,631 GBP per carat, and most listings sit between £324 GBP and £90,555 GBP per carat. About 56% of these stones are listed by more than one retailer, and the same stone is priced 44% apart on average between its cheapest and most expensive seller. The best value grade combination with real depth of stock is F to G SI1 at £26,496 GBP per carat across 25 listings. The same shape in lab grown form runs about £810 GBP per carat, roughly 96% less.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise natural stones in the index: 2,114 USD per carat, -8.8% month on month. See the full index release

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

Last updated: September 2026

Browse 654 diamonds in Explorer

Price Distribution

LowHigh

Colour	FL	IF	VVS1	VVS2	VS1	VS2	SI1	SI2	I
D-E	$79K	$48K	$66K	$52K	$42K	$37K	$24K	$20K	-
F-G	-	$36K	$35K	$49K	$28K	$27K	$34K	$20K	$8,216
H-I	-	$22K	$23K	$28K	$18K	$21K	$24K	$17K	$7,749
J-K	-	$16K	$17K	$11K	$11K	$9,257	$12K	$11K	-
L-M	-	-	-	-	-	$12K	-	$9,379	-
N+	-	-	-	$1,398	$1,096	-	-	$6,768	-

Price by Colour & Clarity

Average price per carat for 5.00ct+ natural marquise diamonds by colour and clarity grade.

Colour	Clarity	Listings	Avg Price/ct	Spread
D-E	FL	58	£62,381 GBP	20%
D-E	IF	18	£37,750 GBP	15%
D-E	SI1	19	£19,190 GBP	23%
D-E	SI2	19	£15,757 GBP	13%
D-E	VS1	14	£33,025 GBP	17%
D-E	VS2	62	£28,859 GBP	17%
D-E	VVS1	10	£52,079 GBP	14%
D-E	VVS2	10	£40,935 GBP	20%
F-G	I	12	£6,469 GBP	21%
F-G	IF	12	£28,552 GBP	12%
F-G	SI1	25	£26,496 GBP	23%
F-G	SI2	11	£16,058 GBP	38%
F-G	VS1	17	£21,873 GBP	51%
F-G	VS2	18	£20,967 GBP	30%
F-G	VVS1	12	£27,198 GBP	16%
F-G	VVS2	23	£38,560 GBP	21%
H-I	I	17	£6,101 GBP	63%
H-I	IF	13	£17,072 GBP	22%
H-I	SI1	10	£19,208 GBP	20%
H-I	SI2	12	£13,125 GBP	21%
H-I	VS1	10	£14,499 GBP	47%
H-I	VS2	13	£16,680 GBP	25%
H-I	VVS1	10	£18,378 GBP	7%
H-I	VVS2	11	£22,255 GBP	21%
J-K	IF	17	£12,287 GBP	26%
J-K	SI1	16	£9,710 GBP	23%
J-K	SI2	35	£8,873 GBP	38%
J-K	VS1	15	£8,746 GBP	19%
J-K	VS2	10	£7,289 GBP	114%
J-K	VVS1	10	£13,249 GBP	18%
J-K	VVS2	11	£9,016 GBP	51%
L-M	SI2	12	£7,385 GBP	31%
L-M	VS2	13	£9,379 GBP	27%
N+	SI2	12	£5,329 GBP	19%
N+	VS1	17	£863 GBP	649%
N+	VVS2	50	£1,101 GBP	44%

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