How much does a 2.00 to 2.99ct G SI2 natural marquise diamond cost?

As of September 2026, 2.00 to 2.99ct G SI2 natural marquise diamonds typically cost £6,094 GBP to £18,286 GBP, with a median price of £11,463 GBP. There are currently 383 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

2.00 to 2.99ct G SI2 Natural Marquise

Quick answer

As of September 2026, there are 383 natural marquise diamonds with G colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £6,094 GBP to £18,286 GBP, with a median of £11,463 GBP. At least 47 retailers stock this exact specification. Half of all listings fall between £4,358 GBP and £7,206 GBP per carat. The same specification in lab grown form lists at a median of about £8,048 GBP per carat.

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

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 natural stones in the index: 2,114 USD per carat, -8.8% 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

383

Lowest Price

£3,154 GBP

Highest Price

£50,566 GBP

Average Price

£11,886 GBP

Market Intelligence

Retailers Selling

Price Spread

47.3%

Price Range

Price per carat distribution across retailers

$8,120/ct

10th Percentile

$4,637

Median

$8,120

90th Percentile

$11,011

Score Distribution

383 diamonds scored across 4 quality tiers

Excellent

67 (17.5%)

Very Good

125 (32.6%)

Good

127 (33.2%)

Average

64 (16.7%)

Find Your Diamond

Search 383 G SI2 marquise diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

H SI2H colour is visually identical to G to the naked eye

Save 8%

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