How much does a 0.20 to 0.49ct I SI2 natural princess diamond cost?

As of November 2026, 0.20 to 0.49ct I SI2 natural princess diamonds typically cost €211 EUR to €420 EUR, with a median price of €275 EUR. There are currently 88 diamonds matching this specification available across retailers.

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

About 54% of these diamonds are available at multiple retailers, with an average price spread of 34%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct I SI2 Natural Princess

Quick answer

As of November 2026, there are 88 natural princess diamonds with I color and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run €211 EUR to €420 EUR, with a median of €275 EUR. At least 12 retailers stock this exact specification, and 54% of the stones appear at more than one of them, with an average price spread of 34%. Half of all listings fall between €679 EUR and €960 EUR per carat. Over the last 30 days the median price moved +4.5% and the number of listings moved -26.9%.

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

Lowest Price

€125 EUR

Highest Price

€847 EUR

Average Price

€313 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

53.9%

Price Spread

34.1%

30-Day Price Trend

+4.5%

30-Day Supply Change

-26.9%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$923/ct

10th Percentile

$647

Median

$923

90th Percentile

$1,400

Score Distribution

192 diamonds scored across 3 quality tiers

Very Good

70 (36.5%)

Good

14 (7.3%)

Average

108 (56.3%)

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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