How much does a 2.00 to 2.99ct I SI2 lab grown round diamond cost?

As of October 2026, 2.00 to 2.99ct I SI2 lab grown round diamonds typically cost $870 USD to $4,383 USD, with a median price of $1,540 USD. There are currently 155 diamonds matching this specification available across retailers.

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

About 51% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI2 Lab Grown Round

Quick answer

As of October 2026, there are 155 lab grown round diamonds with I color and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $870 USD to $4,383 USD, with a median of $1,540 USD. At least 21 retailers stock this exact specification, and 51% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between $1,296 USD and $2,026 USD per carat. The same specification in natural form lists at a median of about $6,798 USD per carat. Over the last 30 days the median price moved +0.4% and the number of listings moved -1.8%.

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: October 2026

Available

155

Lowest Price

$209 USD

Highest Price

$10,103 USD

Average Price

$2,467 USD

Market Intelligence

Retailers Selling

Cross Retailer %

51.3%

Price Spread

52.9%

30-Day Price Trend

+0.4%

30-Day Supply Change

-1.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,382/ct

10th Percentile

$462

Median

$1,382

90th Percentile

$2,165

Score Distribution

286 diamonds scored across 4 quality tiers

Excellent

142 (49.7%)

Very Good

13 (4.5%)

Good

107 (37.4%)

Average

24 (8.4%)

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J SI2J colour is visually identical to I to the naked eye

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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