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

As of November 2026, 0.50 to 0.74ct E I1 lab grown round diamonds typically cost €77 EUR to €532 EUR, with a median price of €131 EUR. 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 November 2026, there are 4 lab grown round diamonds with E color and I1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €77 EUR to €532 EUR, with a median of €131 EUR. 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 €264 EUR and €977 EUR per carat. The same specification in natural form lists at a median of about €1,193 EUR 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: November 2026

Available

Lowest Price

€76 EUR

Highest Price

€780 EUR

Average Price

€235 EUR

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

$1,375

Score Distribution

11 diamonds scored across 3 quality tiers

Very Good

9 (81.8%)

Good

1 (9.1%)

Average

1 (9.1%)

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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