How much does a 1.00 to 1.49ct F SI1 natural princess diamond cost?

As of October 2026, 1.00 to 1.49ct F SI1 natural princess diamonds typically cost $1,655 USD to $5,513 USD, with a median price of $2,727 USD. There are currently 356 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 65%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct F SI1 Natural Princess

Quick answer

As of October 2026, there are 356 natural princess diamonds with F color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,655 USD to $5,513 USD, with a median of $2,727 USD. At least 62 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 65%. Half of all listings fall between $1,933 USD and $3,477 USD per carat. The same specification in lab grown form lists at a median of about $419 USD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +6.8%.

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. 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

356

Lowest Price

$1,280 USD

Highest Price

$10,003 USD

Average Price

$3,124 USD

Market Intelligence

Retailers Selling

Cross Retailer %

39.2%

Price Spread

65.0%

30-Day Price Trend

-1.3%

30-Day Supply Change

+6.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,375/ct

10th Percentile

$1,695

Median

$2,375

90th Percentile

$4,544

Score Distribution

814 diamonds scored across 4 quality tiers

Excellent

148 (18.2%)

Very Good

193 (23.7%)

Good

137 (16.8%)

Average

336 (41.3%)

Find Your Diamond

Search 356 F SI1 princess diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

F SI2SI2 inclusions are not visible without magnification

Save 11%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 82%

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