How much does a 3.00 to 4.99ct E SI2 natural marquise diamond cost?

As of September 2026, 3.00 to 4.99ct E SI2 natural marquise diamonds typically cost £17,420 GBP to £47,168 GBP, with a median price of £31,216 GBP. There are currently 65 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct E SI2 Natural Marquise

Quick answer

As of September 2026, there are 65 natural marquise diamonds with E colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £17,420 GBP to £47,168 GBP, with a median of £31,216 GBP. At least 34 retailers stock this exact specification. Half of all listings fall between £7,403 GBP and £9,686 GBP per carat. The same specification in lab grown form lists at a median of about £254 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

Lowest Price

£13,372 GBP

Highest Price

£84,204 GBP

Average Price

£32,833 GBP

Market Intelligence

Retailers Selling

Price Spread

25.7%

Price Range

Price per carat distribution across retailers

$11,976/ct

10th Percentile

$8,096

Median

$11,976

90th Percentile

$15,788

Score Distribution

65 diamonds scored across 4 quality tiers

Excellent

19 (29.2%)

Very Good

20 (30.8%)

Good

14 (21.5%)

Average

12 (18.5%)

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Consider Instead

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E I1I1 inclusions are not visible without magnification

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Lab-Grown E 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