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 $46,132 CAD to $98,905 CAD, with a median price of $65,960 CAD. There are currently 150 diamonds matching this specification available across retailers.

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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 color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $46,132 CAD to $98,905 CAD, with a median of $65,960 CAD. At least 40 retailers stock this exact specification. Half of all listings fall between $15,577 CAD and $20,688 CAD per carat. The same specification in lab grown form lists at a median of about $455 CAD 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

$26,359 CAD

Highest Price

$258,527 CAD

Average Price

$71,434 CAD

Market Intelligence

Retailers Selling

Price Spread

28.8%

Price Range

Price per carat distribution across retailers

$13,131/ct

10th Percentile

$8,885

Median

$13,131

90th Percentile

$16,335

Score Distribution

150 diamonds scored across 4 quality tiers

Excellent

41 (27.3%)

Very Good

36 (24.0%)

Good

31 (20.7%)

Average

42 (28.0%)

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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