How much does a 3.00 to 4.99ct D I1 natural marquise diamond cost?

As of September 2026, 3.00 to 4.99ct D I1 natural marquise diamonds typically cost £17,421 GBP to £31,388 GBP, with a median price of £24,814 GBP. There are currently 12 diamonds matching this specification available across retailers.

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

About 17% of these diamonds are available at multiple retailers, with an average price spread of 74%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D I1 Natural Marquise

Quick answer

As of September 2026, there are 12 natural marquise diamonds with D colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £17,421 GBP to £31,388 GBP, with a median of £24,814 GBP. At least 7 retailers stock this exact specification, and 17% of the stones appear at more than one of them, with an average price spread of 74%. Half of all listings fall between £6,401 GBP and £12,134 GBP per carat. Over the last 30 days the median price moved -32.3% and the number of listings moved -82.5%.

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

Lowest Price

£15,476 GBP

Highest Price

£96,923 GBP

Average Price

£24,653 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

16.7%

Price Spread

73.9%

30-Day Price Trend

-32.3%

30-Day Supply Change

-82.5%

Price Range

Price per carat distribution across retailers

$9,858/ct

10th Percentile

$6,815

Median

$9,858

90th Percentile

$20,918

Score Distribution

12 diamonds scored across 4 quality tiers

Excellent

1 (8.3%)

Very Good

3 (25.0%)

Good

6 (50.0%)

Average

2 (16.7%)

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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