How much does a 0.75 to 0.99ct I VS1 lab grown marquise diamond cost?

As of October 2026, 0.75 to 0.99ct I VS1 lab grown marquise diamonds typically cost $270 CAD to $1,277 CAD, with a median price of $812 CAD. There are currently 6 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 marquise diamond?

About 13% of these diamonds are available at multiple retailers, with an average price spread of 107%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct I VS1 Lab Grown Marquise

Quick answer

As of October 2026, there are 6 lab grown marquise diamonds with I color and VS1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $270 CAD to $1,277 CAD, with a median of $812 CAD. At least 21 retailers stock this exact specification, and 13% of the stones appear at more than one of them, with an average price spread of 107%. Half of all listings fall between $726 CAD and $2,037 CAD per carat. The same specification in natural form lists at a median of about $4,385 CAD per carat. Over the last 30 days the median price moved +13.0% and the number of listings moved +19.4%.

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 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

$231 CAD

Highest Price

$2,913 CAD

Average Price

$872 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

13.3%

Price Spread

107.0%

30-Day Price Trend

+13.0%

30-Day Supply Change

+19.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$876/ct

10th Percentile

$387

Median

$876

90th Percentile

$3,375

Score Distribution

11 diamonds scored across 4 quality tiers

Excellent

1 (9.1%)

Very Good

5 (45.5%)

Good

1 (9.1%)

Average

4 (36.4%)

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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