How much does a 0.50 to 0.74ct E SI1 lab grown oval diamond cost?

As of October 2026, 0.50 to 0.74ct E SI1 lab grown oval diamonds typically cost €130 EUR to €509 EUR, with a median price of €366 EUR. There are currently 143 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI1 oval diamond?

About 29% of these diamonds are available at multiple retailers, with an average price spread of 70%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E SI1 Lab Grown Oval

Quick answer

As of October 2026, there are 143 lab grown oval diamonds with E color and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €130 EUR to €509 EUR, with a median of €366 EUR. At least 36 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 70%. Half of all listings fall between €324 EUR and €738 EUR per carat. The same specification in natural form lists at a median of about €1,523 EUR per carat. Over the last 30 days the median price moved -3.5% and the number of listings moved +9.6%.

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. Oval lab grown stones in the index: 453 USD per carat, -7.4% 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

143

Lowest Price

€70 EUR

Highest Price

€1,193 EUR

Average Price

€356 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

29.3%

Price Spread

70.5%

30-Day Price Trend

-3.5%

30-Day Supply Change

+9.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$657/ct

10th Percentile

$217

Median

$657

90th Percentile

$1,371

Score Distribution

260 diamonds scored across 4 quality tiers

Excellent

35 (13.5%)

Very Good

52 (20.0%)

Good

79 (30.4%)

Average

94 (36.2%)

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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