How much does a 0.50 to 0.74ct F SI1 lab grown round diamond cost?

As of October 2026, 0.50 to 0.74ct F SI1 lab grown round diamonds typically cost €161 EUR to €1,603 EUR, with a median price of €449 EUR. There are currently 101 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI1 round diamond?

About 27% of these diamonds are available at multiple retailers, with an average price spread of 224%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI1 Lab Grown Round

Quick answer

As of October 2026, there are 101 lab grown round diamonds with F color and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €161 EUR to €1,603 EUR, with a median of €449 EUR. At least 32 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 224%. Half of all listings fall between €373 EUR and €1,913 EUR per carat. The same specification in natural form lists at a median of about €1,576 EUR per carat. Over the last 30 days the median price moved -20.3% and the number of listings moved -18.5%.

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

101

Lowest Price

€78 EUR

Highest Price

€3,478 EUR

Average Price

€731 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

27.1%

Price Spread

223.6%

30-Day Price Trend

-20.3%

30-Day Supply Change

-18.5%

Volatility (30d)

0.07

Price Range

Price per carat distribution across retailers

$769/ct

10th Percentile

$213

Median

$769

90th Percentile

$3,057

Score Distribution

191 diamonds scored across 4 quality tiers

Excellent

29 (15.2%)

Very Good

53 (27.7%)

Good

74 (38.7%)

Average

35 (18.3%)

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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