How much does a 0.20 to 0.49ct F SI1 natural princess diamond cost?

As of November 2026, 0.20 to 0.49ct F SI1 natural princess diamonds typically cost €295 EUR to €858 EUR, with a median price of €478 EUR. There are currently 252 diamonds matching this specification available across retailers.

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

About 79% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct F SI1 Natural Princess

Quick answer

As of November 2026, there are 252 natural princess diamonds with F color and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run €295 EUR to €858 EUR, with a median of €478 EUR. At least 19 retailers stock this exact specification, and 79% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between €840 EUR and €1,356 EUR per carat. The same specification in lab grown form lists at a median of about €205 EUR per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved +12.9%.

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: November 2026

Available

252

Lowest Price

€142 EUR

Highest Price

€1,403 EUR

Average Price

€528 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

79.4%

Price Spread

52.7%

30-Day Price Trend

-0.1%

30-Day Supply Change

+12.9%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,094/ct

10th Percentile

$835

Median

$1,094

90th Percentile

$1,945

Score Distribution

603 diamonds scored across 4 quality tiers

Excellent

44 (7.3%)

Very Good

125 (20.7%)

Good

83 (13.8%)

Average

351 (58.2%)

Find Your Diamond

Search 252 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.

Lab-Grown F SI1Same specifications, lab-grown origin

Save 75%

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