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 HK$180,978 HKD to HK$500,963 HKD, with a median price of HK$330,175 HKD. There are currently 63 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 63 natural marquise diamonds with E colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$180,978 HKD to HK$500,963 HKD, with a median of HK$330,175 HKD. At least 41 retailers stock this exact specification. Half of all listings fall between HK$87,150 HKD and HK$119,462 HKD per carat. The same specification in lab grown form lists at a median of about HK$2,642 HKD 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

HK$141,431 HKD

Highest Price

HK$890,617 HKD

Average Price

HK$345,853 HKD

Market Intelligence

Retailers Selling

Price Spread

31.6%

Price Range

Price per carat distribution across retailers

$13,039/ct

10th Percentile

$8,500

Median

$13,039

90th Percentile

$16,329

Score Distribution

63 diamonds scored across 4 quality tiers

Excellent

19 (30.2%)

Very Good

20 (31.7%)

Good

14 (22.2%)

Average

10 (15.9%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

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