How much does a 1.50 to 1.99ct J SI2 lab grown round diamond cost?

As of November 2026, 1.50 to 1.99ct J SI2 lab grown round diamonds typically cost €743 EUR to €1,514 EUR, with a median price of €913 EUR. There are currently 79 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 round diamond?

About 54% of these diamonds are available at multiple retailers, with an average price spread of 62%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI2 Lab Grown Round

Quick answer

As of November 2026, there are 79 lab grown round diamonds with J color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €743 EUR to €1,514 EUR, with a median of €913 EUR. At least 16 retailers stock this exact specification, and 54% of the stones appear at more than one of them, with an average price spread of 62%. Half of all listings fall between €699 EUR and €1,360 EUR per carat. The same specification in natural form lists at a median of about €2,577 EUR per carat. Over the last 30 days the median price moved -5.7% and the number of listings moved -3.8%.

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

€331 EUR

Highest Price

€4,664 EUR

Average Price

€1,121 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

53.5%

Price Spread

61.9%

30-Day Price Trend

-5.7%

30-Day Supply Change

-3.8%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,193/ct

10th Percentile

$696

Median

$1,193

90th Percentile

$2,221

Score Distribution

129 diamonds scored across 4 quality tiers

Excellent

72 (55.8%)

Very Good

1 (0.8%)

Good

53 (41.1%)

Average

3 (2.3%)

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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