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

As of September 2026, 3.00 to 4.99ct D SI2 natural marquise diamonds typically cost $51,605 NZD to $123,941 NZD, with a median price of $82,543 NZD. There are currently 150 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct D SI2 Natural Marquise

Quick answer

As of September 2026, there are 150 natural marquise diamonds with D colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $51,605 NZD to $123,941 NZD, with a median of $82,543 NZD. At least 34 retailers stock this exact specification. Half of all listings fall between $17,338 NZD and $22,684 NZD per carat. The same specification in lab grown form lists at a median of about $596 NZD 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

150

Lowest Price

$33,994 NZD

Highest Price

$332,286 NZD

Average Price

$89,265 NZD

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

150 diamonds scored across 4 quality tiers

Excellent

42 (28.0%)

Very Good

36 (24.0%)

Good

30 (20.0%)

Average

42 (28.0%)

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Consider Instead

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Lab-Grown D 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