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

As of October 2026, 3.00 to 4.99ct D SI2 natural marquise diamonds typically cost $27,526 USD to $73,812 USD, with a median price of $45,724 USD. There are currently 52 diamonds matching this specification available across retailers.

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

About 36% 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 D SI2 Natural Marquise

Quick answer

As of October 2026, there are 52 natural marquise diamonds with D color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $27,526 USD to $73,812 USD, with a median of $45,724 USD. At least 46 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 32%. Half of all listings fall between $12,074 USD and $16,734 USD per carat. The same specification in lab grown form lists at a median of about $325 USD per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved +7.9%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise natural stones in the index: 2,268 USD per carat, +10.8% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

$19,153 USD

Highest Price

$154,705 USD

Average Price

$48,936 USD

Market Intelligence

Retailers Selling

Cross Retailer %

36.5%

Price Spread

32.4%

30-Day Price Trend

-0.1%

30-Day Supply Change

+7.9%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$14,395/ct

10th Percentile

$9,537

Median

$14,395

90th Percentile

$18,788

Score Distribution

130 diamonds scored across 5 quality tiers

Exceptional

1 (0.8%)

Excellent

37 (28.5%)

Very Good

37 (28.5%)

Good

23 (17.7%)

Average

32 (24.6%)

Find Your Diamond

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Consider Instead

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

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