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

As of September 2026, 3.00 to 4.99ct F I1 natural marquise diamonds typically cost £7,448 GBP to £29,419 GBP, with a median price of £15,232 GBP. There are currently 10 diamonds matching this specification available across retailers.

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

About 26% of these diamonds are available at multiple retailers, with an average price spread of 32%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F I1 Natural Marquise

Quick answer

As of September 2026, there are 10 natural marquise diamonds with F colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £7,448 GBP to £29,419 GBP, with a median of £15,232 GBP. At least 7 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 32%. Half of all listings fall between £2,508 GBP and £3,465 GBP per carat. Over the last 30 days the median price moved -23.0% and the number of listings moved -63.6%.

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

£6,795 GBP

Highest Price

£48,116 GBP

Average Price

£18,302 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

26.3%

Price Spread

31.9%

30-Day Price Trend

-23.0%

30-Day Supply Change

-63.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$4,009/ct

10th Percentile

$2,578

Median

$4,009

90th Percentile

$7,351

Score Distribution

10 diamonds scored across 4 quality tiers

Excellent

1 (10.0%)

Very Good

5 (50.0%)

Good

3 (30.0%)

Average

1 (10.0%)

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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