How much does a 2.00 to 2.99ct D SI2 natural marquise diamond cost?

As of September 2026, 2.00 to 2.99ct D SI2 natural marquise diamonds typically cost £10,109 GBP to £22,136 GBP, with a median price of £14,450 GBP. There are currently 356 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI2 marquise diamond?

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2.00 to 2.99ct D SI2 Natural Marquise

Quick answer

As of September 2026, there are 356 natural marquise diamonds with D colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £10,109 GBP to £22,136 GBP, with a median of £14,450 GBP. At least 44 retailers stock this exact specification. Half of all listings fall between £5,904 GBP and £7,997 GBP per carat. The same specification in lab grown form lists at a median of about £278 GBP per carat.

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

Available

356

Lowest Price

£6,262 GBP

Highest Price

£95,921 GBP

Average Price

£15,714 GBP

Market Intelligence

Retailers Selling

Price Spread

29.9%

Price Range

Price per carat distribution across retailers

$9,444/ct

10th Percentile

$5,811

Median

$9,444

90th Percentile

$12,415

Score Distribution

356 diamonds scored across 4 quality tiers

Excellent

76 (21.3%)

Very Good

111 (31.2%)

Good

95 (26.7%)

Average

74 (20.8%)

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Lab-Grown D SI2Same specifications, lab-grown origin

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1