How much does a 5.00ct+ E I1 lab grown round diamond cost?

As of October 2026, 5.00ct+ E I1 lab grown round diamonds typically cost £568 GBP to £622 GBP, with a median price of £595 GBP. There are currently 1 diamonds matching this specification available across retailers.

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

About 100% of these diamonds are available at multiple retailers, with an average price spread of 94%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ E I1 Lab Grown Round

Quick answer

As of October 2026, there are 1 lab grown round diamonds with E colour and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £568 GBP to £622 GBP, with a median of £595 GBP. At least 11 retailers stock this exact specification, and 100% of the stones appear at more than one of them, with an average price spread of 94%. Half of all listings fall between £106 GBP and £223 GBP per carat. The same specification in natural form lists at a median of about £8,417 GBP per carat.

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

6.03ct Round E I1, IGI, grade B+, from £629 GBP

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

Lowest Price

£561 GBP

Highest Price

£2,559 GBP

Average Price

£595 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

100.0%

Price Spread

94.4%

Price Range

Price per carat distribution across retailers

$164/ct

10th Percentile

$133

Median

$164

90th Percentile

$422

Score Distribution

2 diamonds scored across 1 quality tiers

Very Good

2 (100.0%)

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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