How much does a 3.00 to 4.99ct E I1 natural cushion diamond cost?

As of September 2026, 3.00 to 4.99ct E I1 natural cushion diamonds typically cost £13,407 GBP to £29,552 GBP, with a median price of £16,222 GBP. There are currently 6 diamonds matching this specification available across retailers.

Where can I find the best price on a E I1 cushion diamond?

About 25% of these diamonds are available at multiple retailers, with an average price spread of 78%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct E I1 Natural Cushion

Quick answer

As of September 2026, there are 6 natural cushion diamonds with E colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £13,407 GBP to £29,552 GBP, with a median of £16,222 GBP. At least 7 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 78%. Half of all listings fall between £5,617 GBP and £12,039 GBP per carat. Over the last 30 days the median price moved -7.6% and the number of listings moved -81.8%.

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

Lowest Price

£12,501 GBP

Highest Price

£51,025 GBP

Average Price

£19,727 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

25.0%

Price Spread

78.0%

30-Day Price Trend

-7.6%

30-Day Supply Change

-81.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$11,106/ct

10th Percentile

$6,483

Median

$11,106

90th Percentile

$19,918

Score Distribution

6 diamonds scored across 4 quality tiers

Excellent

1 (16.7%)

Very Good

3 (50.0%)

Good

1 (16.7%)

Average

1 (16.7%)

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Consider Instead

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

F I1F colour is visually identical to E to the naked eye

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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