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

As of October 2026, 2.00 to 2.99ct D SI2 natural marquise diamonds typically cost £8,868 GBP to £31,663 GBP, with a median price of £14,288 GBP. There are currently 117 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 37%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct D SI2 Natural Marquise

Quick answer

As of October 2026, there are 117 natural marquise diamonds with D colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £8,868 GBP to £31,663 GBP, with a median of £14,288 GBP. At least 51 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 37%. Half of all listings fall between £5,510 GBP and £7,990 GBP per carat. The same specification in lab grown form lists at a median of about £192 GBP per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +22.9%.

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

Available

117

Lowest Price

£5,599 GBP

Highest Price

£60,555 GBP

Average Price

£17,592 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

34.2%

Price Spread

36.7%

30-Day Price Trend

-0.8%

30-Day Supply Change

+22.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$8,993/ct

10th Percentile

$5,379

Median

$8,993

90th Percentile

$12,465

Score Distribution

351 diamonds scored across 5 quality tiers

Exceptional

1 (0.3%)

Excellent

87 (24.8%)

Very Good

97 (27.6%)

Good

62 (17.7%)

Average

104 (29.6%)

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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