How much does a 2.00 to 2.99ct H SI1 natural cushion diamond cost?

As of September 2026, 2.00 to 2.99ct H SI1 natural cushion diamonds typically cost £6,577 GBP to £20,186 GBP, with a median price of £11,639 GBP. There are currently 796 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI1 cushion diamond?

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2.00 to 2.99ct H SI1 Natural Cushion

Quick answer

As of September 2026, there are 796 natural cushion diamonds with H colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £6,577 GBP to £20,186 GBP, with a median of £11,639 GBP. At least 49 retailers stock this exact specification. Half of all listings fall between £3,642 GBP and £5,815 GBP per carat. The same specification in lab grown form lists at a median of about £1,256 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. Cushion natural stones in the index: 2,792 USD per carat, +1.1% 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

796

Lowest Price

£3,843 GBP

Highest Price

£43,491 GBP

Average Price

£12,812 GBP

Market Intelligence

Retailers Selling

Price Spread

46.7%

Price Range

Price per carat distribution across retailers

$5,906/ct

10th Percentile

$3,779

Median

$5,906

90th Percentile

$8,890

Score Distribution

796 diamonds scored across 4 quality tiers

Excellent

77 (9.7%)

Very Good

141 (17.7%)

Good

298 (37.4%)

Average

280 (35.2%)

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Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

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Lab-Grown H SI1Same specifications, lab-grown origin

Save 74%

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