How much does a 3.00 to 4.99ct I VS2 lab grown marquise diamond cost?

As of October 2026, 3.00 to 4.99ct I VS2 lab grown marquise diamonds typically cost £525 GBP to £2,156 GBP, with a median price of £1,486 GBP. There are currently 4 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS2 marquise diamond?

About 10% of these diamonds are available at multiple retailers, with an average price spread of 77%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I VS2 Lab Grown Marquise

Quick answer

As of October 2026, there are 4 lab grown marquise diamonds with I colour and VS2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £525 GBP to £2,156 GBP, with a median of £1,486 GBP. At least 28 retailers stock this exact specification, and 10% of the stones appear at more than one of them, with an average price spread of 77%. Half of all listings fall between £354 GBP and £777 GBP per carat. The same specification in natural form lists at a median of about £12,541 GBP per carat. Over the last 30 days the median price moved +54.0% and the number of listings moved +10.9%.

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

£465 GBP

Highest Price

£2,280 GBP

Average Price

£1,389 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

10.2%

Price Spread

76.8%

30-Day Price Trend

+54.0%

30-Day Supply Change

+10.9%

Volatility (30d)

0.13

Price Range

Price per carat distribution across retailers

$732/ct

10th Percentile

$254

Median

$732

90th Percentile

$1,172

Score Distribution

6 diamonds scored across 3 quality tiers

Excellent

2 (33.3%)

Good

3 (50.0%)

Average

1 (16.7%)

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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