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

As of October 2026, 5.00ct+ natural marquise diamonds range from £132 GBP/ct to £16,831 GBP/ct, with an average of £2,876 GBP/ct.

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

As of October 2026, the lowest listed price is £132 GBP per carat and the highest is £16,831 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 157 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 50% of these diamonds are available at multiple retailers, with an average price spread of 604% between the cheapest and most expensive listing of the same stone.

Natural Marquise Diamonds, 5.00ct+

Quick answer

As of October 2026, there are 157 listings of natural marquise diamonds between 5.00ct+ from at least 17 retailers. A typical stone in this range costs about £17,255 GBP in total, or £2,876 GBP per carat, and most listings sit between £132 GBP and £16,831 GBP per carat. About 50% of these stones are listed by more than one retailer, and the same stone is priced 604% apart on average between its cheapest and most expensive seller. The same shape in lab grown form runs about £638 GBP per carat, roughly 78% less.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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 157 diamonds in Explorer

Price Distribution

LowHigh

Colour	VVS2	VS1	VS2	SI1	SI2	I
N+	$1,564	$4,806	$303	$10K	$6,936	$1,535

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
N+	I	24	£1,153 GBP	113%
N+	SI1	10	£7,584 GBP	12%
N+	SI2	15	£5,209 GBP	10%
N+	VS1	14	£3,609 GBP	275%
N+	VS2	20	£228 GBP	3728%
N+	VVS2	74	£1,174 GBP	47%

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