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

As of November 2026, 1.50 to 1.99ct G SI2 lab grown round diamonds typically cost €273 EUR to €1,736 EUR, with a median price of €578 EUR. There are currently 27 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 116%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI2 Lab Grown Round

Quick answer

As of November 2026, there are 27 lab grown round diamonds with G color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €273 EUR to €1,736 EUR, with a median of €578 EUR. At least 34 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 116%. Half of all listings fall between €207 EUR and €668 EUR per carat. The same specification in natural form lists at a median of about €3,690 EUR per carat. Over the last 30 days the median price moved +9.1% and the number of listings moved +14.1%.

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

€159 EUR

Highest Price

€2,077 EUR

Average Price

€789 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

37.9%

Price Spread

115.7%

30-Day Price Trend

+9.1%

30-Day Supply Change

+14.1%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$445/ct

10th Percentile

$165

Median

$445

90th Percentile

$967

Score Distribution

42 diamonds scored across 4 quality tiers

Excellent

7 (16.7%)

Very Good

14 (33.3%)

Good

10 (23.8%)

Average

11 (26.2%)

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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