How much does a 2.00 to 2.99ct E SI2 natural cushion diamond cost?

As of October 2026, 2.00 to 2.99ct E SI2 natural cushion diamonds typically cost £4,756 GBP to £23,507 GBP, with a median price of £10,677 GBP. There are currently 128 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI2 cushion diamond?

About 35% of these diamonds are available at multiple retailers, with an average price spread of 56%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct E SI2 Natural Cushion

Quick answer

As of October 2026, there are 128 natural cushion diamonds with E colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £4,756 GBP to £23,507 GBP, with a median of £10,677 GBP. At least 53 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 56%. Half of all listings fall between £3,284 GBP and £5,669 GBP per carat. The same specification in lab grown form lists at a median of about £362 GBP per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +10.3%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

128

Lowest Price

£2,957 GBP

Highest Price

£48,891 GBP

Average Price

£13,290 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

35.1%

Price Spread

56.2%

30-Day Price Trend

-1.8%

30-Day Supply Change

+10.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,650/ct

10th Percentile

$3,414

Median

$5,650

90th Percentile

$9,183

Score Distribution

382 diamonds scored across 4 quality tiers

Excellent

89 (23.3%)

Very Good

85 (22.3%)

Good

62 (16.2%)

Average

146 (38.2%)

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Consider Instead

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

F SI2F colour is visually identical to E to the naked eye

Save 8%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 89%

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