How much does a 2.00 to 2.99ct I SI1 lab grown princess diamond cost?

As of October 2026, 2.00 to 2.99ct I SI1 lab grown princess diamonds typically cost $1,090 USD to $4,313 USD, with a median price of $1,172 USD. There are currently 16 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 108%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI1 Lab Grown Princess

Quick answer

As of October 2026, there are 16 lab grown princess diamonds with I color and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $1,090 USD to $4,313 USD, with a median of $1,172 USD. At least 29 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 108%. Half of all listings fall between $545 USD and $2,066 USD per carat. The same specification in natural form lists at a median of about $6,756 USD per carat. Over the last 30 days the median price moved +0.0% and the number of listings moved +7.3%.

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. Princess lab grown stones in the index: 461 USD per carat, -4.8% 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

Lowest Price

$555 USD

Highest Price

$9,529 USD

Average Price

$1,967 USD

Market Intelligence

Retailers Selling

Cross Retailer %

42.5%

Price Spread

107.9%

30-Day Price Trend

+0.0%

30-Day Supply Change

+7.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,410/ct

10th Percentile

$253

Median

$1,410

90th Percentile

$2,343

Score Distribution

24 diamonds scored across 3 quality tiers

Excellent

14 (58.3%)

Very Good

4 (16.7%)

Average

6 (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