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

As of October 2026, 0.50 to 0.74ct H SI1 lab grown round diamonds typically cost €258 EUR to €1,925 EUR, with a median price of €958 EUR. There are currently 33 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 114%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct H SI1 Lab Grown Round

Quick answer

As of October 2026, there are 33 lab grown round diamonds with H colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €258 EUR to €1,925 EUR, with a median of €958 EUR. At least 29 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 114%. Half of all listings fall between €595 EUR and €1,801 EUR per carat. The same specification in natural form lists at a median of about €1,380 EUR per carat. Over the last 30 days the median price moved -14.1% and the number of listings moved -56.2%.

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

€221 EUR

Highest Price

€3,036 EUR

Average Price

€1,038 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

32.1%

Price Spread

114.1%

30-Day Price Trend

-14.1%

30-Day Supply Change

-56.2%

Volatility (30d)

0.08

Price Range

Price per carat distribution across retailers

$1,177/ct

10th Percentile

$537

Median

$1,177

90th Percentile

$2,558

Score Distribution

45 diamonds scored across 4 quality tiers

Excellent

1 (2.2%)

Very Good

9 (20.0%)

Good

24 (53.3%)

Average

11 (24.4%)

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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