How much does a 3.00 to 4.99ct I VS1 lab grown marquise diamond cost?

As of October 2026, 3.00 to 4.99ct I VS1 lab grown marquise diamonds typically cost $1,088 CAD to $4,552 CAD, with a median price of $2,006 CAD. There are currently 19 diamonds matching this specification available across retailers.

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

About 18% of these diamonds are available at multiple retailers, with an average price spread of 91%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I VS1 Lab Grown Marquise

Quick answer

As of October 2026, there are 19 lab grown marquise diamonds with I color and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $1,088 CAD to $4,552 CAD, with a median of $2,006 CAD. At least 33 retailers stock this exact specification, and 18% of the stones appear at more than one of them, with an average price spread of 91%. Half of all listings fall between $487 CAD and $1,347 CAD per carat. The same specification in natural form lists at a median of about $20,952 CAD per carat. Over the last 30 days the median price moved +48.2% and the number of listings moved +12.3%.

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

$862 CAD

Highest Price

$7,807 CAD

Average Price

$2,612 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

18.0%

Price Spread

91.3%

30-Day Price Trend

+48.2%

30-Day Supply Change

+12.3%

Volatility (30d)

0.12

Price Range

Price per carat distribution across retailers

$675/ct

10th Percentile

$256

Median

$675

90th Percentile

$1,160

Score Distribution

34 diamonds scored across 4 quality tiers

Excellent

10 (29.4%)

Very Good

2 (5.9%)

Good

15 (44.1%)

Average

7 (20.6%)

Find Your Diamond

Search 19 I VS1 marquise diamonds and compare prices.

Search Diamonds

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