How much does a 2.00 to 2.99ct I I1 natural marquise diamond cost?

As of November 2026, 2.00 to 2.99ct I I1 natural marquise diamonds typically cost £8,148 GBP to £37,325 GBP, with a median price of £21,010 GBP. There are currently 13 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 marquise diamond?

About 13% of these diamonds are available at multiple retailers, with an average price spread of 97%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I I1 Natural Marquise

Quick answer

As of November 2026, there are 13 natural marquise diamonds with I colour and I1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £8,148 GBP to £37,325 GBP, with a median of £21,010 GBP. At least 23 retailers stock this exact specification, and 13% of the stones appear at more than one of them, with an average price spread of 97%. Half of all listings fall between £2,565 GBP and £7,210 GBP per carat. Over the last 30 days the median price moved +3.5% and the number of listings moved -1.8%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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: November 2026

Available

Lowest Price

£2,431 GBP

Highest Price

£45,853 GBP

Average Price

£21,658 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

12.9%

Price Spread

97.0%

30-Day Price Trend

+3.5%

30-Day Supply Change

-1.8%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$6,425/ct

10th Percentile

$2,335

Median

$6,425

90th Percentile

$13,064

Score Distribution

100 diamonds scored across 4 quality tiers

Excellent

4 (4.0%)

Very Good

6 (6.0%)

Good

3 (3.0%)

Average

87 (87.0%)

Find Your Diamond

Search 13 I I1 marquise diamonds and compare prices.

Search Diamonds

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