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

As of September 2026, 3.00 to 4.99ct H SI2 natural marquise diamonds typically cost $27,061 CAD to $74,138 CAD, with a median price of $44,096 CAD. There are currently 109 diamonds matching this specification available across retailers.

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3.00 to 4.99ct H SI2 Natural Marquise

Quick answer

As of September 2026, there are 109 natural marquise diamonds with H color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $27,061 CAD to $74,138 CAD, with a median of $44,096 CAD. At least 43 retailers stock this exact specification. Half of all listings fall between $12,176 CAD and $18,688 CAD per carat. The same specification in lab grown form lists at a median of about $9,658 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

109

Lowest Price

$23,166 CAD

Highest Price

$145,497 CAD

Average Price

$48,421 CAD

Market Intelligence

Retailers Selling

Price Spread

40.5%

Price Range

Price per carat distribution across retailers

$11,544/ct

10th Percentile

$6,784

Median

$11,544

90th Percentile

$15,015

Score Distribution

109 diamonds scored across 4 quality tiers

Excellent

8 (7.3%)

Very Good

38 (34.9%)

Good

37 (33.9%)

Average

26 (23.9%)

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Consider Instead

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

Lab-Grown H 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