How much does a 2.00 to 2.99ct H SI2 lab grown marquise diamond cost?

As of September 2026, 2.00 to 2.99ct H SI2 lab grown marquise diamonds typically cost £1,872 GBP to £13,211 GBP, with a median price of £7,002 GBP. There are currently 3 diamonds matching this specification available across retailers.

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

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2.00 to 2.99ct H SI2 Lab Grown Marquise

Quick answer

As of September 2026, there are 3 lab grown marquise diamonds with H colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £1,872 GBP to £13,211 GBP, with a median of £7,002 GBP. At least 9 retailers stock this exact specification. Half of all listings fall between £1,963 GBP and £7,345 GBP per carat. The same specification in natural form lists at a median of about £6,803 GBP per carat.

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

2.01ct Marquise H SI2, GIA, score 60 of 100, from £14,764 GBP

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise lab grown stones in the index: 500 USD per carat, -14.7% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

£589 GBP

Highest Price

£15,252 GBP

Average Price

£7,452 GBP

Market Intelligence

Retailers Selling

Price Spread

151.2%

Price Range

Price per carat distribution across retailers

$4,521/ct

10th Percentile

$2,261

Median

$4,521

90th Percentile

$9,594

Score Distribution

3 diamonds scored across 2 quality tiers

Good

1 (33.3%)

Average

2 (66.7%)

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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