How much does a 2.00 to 2.99ct D SI1 natural marquise diamond cost?

As of October 2026, 2.00 to 2.99ct D SI1 natural marquise diamonds typically cost $19,766 USD to $38,149 USD, with a median price of $25,780 USD. There are currently 140 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI1 marquise diamond?

About 37% of these diamonds are available at multiple retailers, with an average price spread of 26%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct D SI1 Natural Marquise

Quick answer

As of October 2026, there are 140 natural marquise diamonds with D color and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $19,766 USD to $38,149 USD, with a median of $25,780 USD. At least 59 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 26%. Half of all listings fall between $10,934 USD and $14,193 USD per carat. The same specification in lab grown form lists at a median of about $391 USD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +22.9%.

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

140

Lowest Price

$16,282 USD

Highest Price

$79,296 USD

Average Price

$28,169 USD

Market Intelligence

Retailers Selling

Cross Retailer %

36.6%

Price Spread

26.3%

30-Day Price Trend

-0.8%

30-Day Supply Change

+22.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$12,409/ct

10th Percentile

$9,795

Median

$12,409

90th Percentile

$16,247

Score Distribution

331 diamonds scored across 4 quality tiers

Excellent

34 (10.3%)

Very Good

110 (33.2%)

Good

81 (24.5%)

Average

106 (32.0%)

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Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D SI1Same 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