How much does a 1.50 to 1.99ct I I1 natural princess diamond cost?

As of October 2026, 1.50 to 1.99ct I I1 natural princess diamonds typically cost $3,028 USD to $7,631 USD, with a median price of $4,896 USD. There are currently 41 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 princess diamond?

About 12% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I I1 Natural Princess

Quick answer

As of October 2026, there are 41 natural princess diamonds with I color and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,028 USD to $7,631 USD, with a median of $4,896 USD. At least 25 retailers stock this exact specification, and 12% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $2,354 USD and $3,663 USD per carat. The same specification in lab grown form lists at a median of about $2,815 USD per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved -2.4%.

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 natural stones in the index: 2,158 USD per carat, +5.7% 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

$1,547 USD

Highest Price

$11,419 USD

Average Price

$5,217 USD

Market Intelligence

Retailers Selling

Cross Retailer %

12.4%

Price Spread

44.1%

30-Day Price Trend

-2.3%

30-Day Supply Change

-2.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,973/ct

10th Percentile

$1,780

Median

$2,973

90th Percentile

$4,297

Score Distribution

197 diamonds scored across 4 quality tiers

Excellent

5 (2.5%)

Very Good

27 (13.7%)

Good

15 (7.6%)

Average

150 (76.1%)

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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