How much does a 1.50 to 1.99ct H SI2 lab grown marquise diamond cost?

As of October 2026, 1.50 to 1.99ct H SI2 lab grown marquise diamonds typically cost $1,806 CAD to $2,790 CAD, with a median price of $2,298 CAD. There are currently 1 diamonds matching this specification available across retailers.

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

About 25% of these diamonds are available at multiple retailers, with an average price spread of 66%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI2 Lab Grown Marquise

Quick answer

As of October 2026, there are 1 lab grown marquise diamonds with H color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $1,806 CAD to $2,790 CAD, with a median of $2,298 CAD. At least 13 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 66%. Half of all listings fall between $1,221 CAD and $2,494 CAD per carat. The same specification in natural form lists at a median of about $6,536 CAD per carat. Over the last 30 days the median price moved -5.0% and the number of listings moved -10.6%.

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

1.50ct Marquise H SI2, IGI, grade A, from $1,683 CAD

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 lab grown stones in the index: 485 USD per carat, -3.2% 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

$1,683 CAD

Highest Price

$6,309 CAD

Average Price

$2,298 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

25.0%

Price Spread

66.5%

30-Day Price Trend

-5.0%

30-Day Supply Change

-10.6%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,371/ct

10th Percentile

$811

Median

$1,371

90th Percentile

$3,017

Score Distribution

2 diamonds scored across 2 quality tiers

Excellent

1 (50.0%)

Average

1 (50.0%)

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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