How much does a 1.50 to 1.99ct H SI2 lab grown princess diamond cost?

As of October 2026, 1.50 to 1.99ct H SI2 lab grown princess diamonds typically cost $599 USD to $3,656 USD, with a median price of $870 USD. There are currently 3 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 91%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI2 Lab Grown Princess

Quick answer

As of October 2026, there are 3 lab grown princess diamonds with H color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $599 USD to $3,656 USD, with a median of $870 USD. At least 16 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 91%. Half of all listings fall between $828 USD and $1,609 USD per carat. The same specification in natural form lists at a median of about $3,146 USD per carat. Over the last 30 days the median price moved +23.6% and the number of listings moved -13.7%.

Three of the best scored stones at this specification right now:

1.50ct Princess H SI2, GIA, grade C, from $4,790 USD

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

$543 USD

Highest Price

$4,790 USD

Average Price

$1,768 USD

Market Intelligence

Retailers Selling

Cross Retailer %

36.4%

Price Spread

90.9%

30-Day Price Trend

+23.6%

30-Day Supply Change

-13.7%

Volatility (30d)

0.08

Price Range

Price per carat distribution across retailers

$859/ct

10th Percentile

$699

Median

$859

90th Percentile

$3,409

Score Distribution

5 diamonds scored across 3 quality tiers

Very Good

1 (20.0%)

Good

1 (20.0%)

Average

3 (60.0%)

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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