How much does a 1.50 to 1.99ct H SI1 lab grown round diamond cost?

As of November 2026, 1.50 to 1.99ct H SI1 lab grown round diamonds typically cost €295 EUR to €5,065 EUR, with a median price of €1,152 EUR. There are currently 111 diamonds matching this specification available across retailers.

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

About 44% of these diamonds are available at multiple retailers, with an average price spread of 91%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI1 Lab Grown Round

Quick answer

As of November 2026, there are 111 lab grown round diamonds with H color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €295 EUR to €5,065 EUR, with a median of €1,152 EUR. At least 36 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 91%. Half of all listings fall between €812 EUR and €1,666 EUR per carat. The same specification in natural form lists at a median of about €4,203 EUR per carat. Over the last 30 days the median price moved -7.6% and the number of listings moved +10.2%.

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: November 2026

Available

111

Lowest Price

€166 EUR

Highest Price

€6,033 EUR

Average Price

€1,901 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

43.9%

Price Spread

90.7%

30-Day Price Trend

-7.6%

30-Day Supply Change

+10.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,053/ct

10th Percentile

$462

Median

$1,053

90th Percentile

$1,978

Score Distribution

263 diamonds scored across 4 quality tiers

Excellent

75 (28.5%)

Very Good

33 (12.5%)

Good

70 (26.6%)

Average

85 (32.3%)

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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