How much does a 1.00 to 1.49ct J SI2 natural princess diamond cost?

As of October 2026, 1.00 to 1.49ct J SI2 natural princess diamonds typically cost $1,145 USD to $3,377 USD, with a median price of $2,029 USD. There are currently 153 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J SI2 Natural Princess

Quick answer

As of October 2026, there are 153 natural princess diamonds with J color and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,145 USD to $3,377 USD, with a median of $2,029 USD. At least 46 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between $1,131 USD and $1,981 USD per carat. Over the last 30 days the median price moved -0.7% and the number of listings moved +10.4%.

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

153

Lowest Price

$786 USD

Highest Price

$6,764 USD

Average Price

$2,174 USD

Market Intelligence

Retailers Selling

Cross Retailer %

37.9%

Price Spread

58.1%

30-Day Price Trend

-0.7%

30-Day Supply Change

+10.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,463/ct

10th Percentile

$965

Median

$1,463

90th Percentile

$2,781

Score Distribution

438 diamonds scored across 4 quality tiers

Excellent

45 (10.3%)

Very Good

78 (17.8%)

Good

73 (16.7%)

Average

242 (55.3%)

Find Your Diamond

Search 153 J SI2 princess diamonds and compare prices.

Search Diamonds

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