How much does a 1.50 to 1.99ct D SI2 natural marquise diamond cost?

As of October 2026, 1.50 to 1.99ct D SI2 natural marquise diamonds typically cost $8,014 CAD to $25,478 CAD, with a median price of $13,127 CAD. There are currently 192 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 42%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D SI2 Natural Marquise

Quick answer

As of October 2026, there are 192 natural marquise diamonds with D color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $8,014 CAD to $25,478 CAD, with a median of $13,127 CAD. At least 55 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between $7,334 CAD and $11,169 CAD per carat. The same specification in lab grown form lists at a median of about $405 CAD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +15.4%.

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

192

Lowest Price

$5,312 CAD

Highest Price

$45,673 CAD

Average Price

$15,096 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

35.6%

Price Spread

42.2%

30-Day Price Trend

-0.8%

30-Day Supply Change

+15.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$6,496/ct

10th Percentile

$4,050

Median

$6,496

90th Percentile

$9,736

Score Distribution

524 diamonds scored across 4 quality tiers

Excellent

122 (23.3%)

Very Good

181 (34.5%)

Good

105 (20.0%)

Average

116 (22.1%)

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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