How much does a 0.75 to 0.99ct G SI2 lab grown round diamond cost?

As of November 2026, 0.75 to 0.99ct G SI2 lab grown round diamonds typically cost €156 EUR to €1,428 EUR, with a median price of €470 EUR. There are currently 18 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 176%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct G SI2 Lab Grown Round

Quick answer

As of November 2026, there are 18 lab grown round diamonds with G color and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run €156 EUR to €1,428 EUR, with a median of €470 EUR. At least 24 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 176%. Half of all listings fall between €348 EUR and €1,331 EUR per carat. The same specification in natural form lists at a median of about €1,757 EUR per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved -9.8%.

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

€102 EUR

Highest Price

€3,223 EUR

Average Price

€764 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

34.3%

Price Spread

175.8%

30-Day Price Trend

-1.4%

30-Day Supply Change

-9.8%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$625/ct

10th Percentile

$161

Median

$625

90th Percentile

$2,138

Score Distribution

28 diamonds scored across 4 quality tiers

Excellent

1 (3.6%)

Very Good

12 (42.9%)

Good

8 (28.6%)

Average

7 (25.0%)

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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