How much does a 0.50 to 0.74ct E I1 lab grown round diamond cost?

As of October 2026, 0.50 to 0.74ct E I1 lab grown round diamonds typically cost £65 GBP to £447 GBP, with a median price of £110 GBP. There are currently 4 diamonds matching this specification available across retailers.

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

About 59% of these diamonds are available at multiple retailers, with an average price spread of 196%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E I1 Lab Grown Round

Quick answer

As of October 2026, there are 4 lab grown round diamonds with E colour and I1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £65 GBP to £447 GBP, with a median of £110 GBP. At least 13 retailers stock this exact specification, and 59% of the stones appear at more than one of them, with an average price spread of 196%. Half of all listings fall between £222 GBP and £820 GBP per carat. The same specification in natural form lists at a median of about £1,006 GBP per carat.

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. 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

£64 GBP

Highest Price

£658 GBP

Average Price

£198 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

58.8%

Price Spread

195.6%

Price Range

Price per carat distribution across retailers

$407/ct

10th Percentile

$195

Median

$407

90th Percentile

$1,377

Score Distribution

12 diamonds scored across 3 quality tiers

Very Good

9 (75.0%)

Good

1 (8.3%)

Average

2 (16.7%)

Find Your Diamond

Search 4 E I1 round diamonds and compare prices.

Search Diamonds

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