How much does a 3.00 to 4.99ct I SI2 natural princess diamond cost?

As of November 2026, 3.00 to 4.99ct I SI2 natural princess diamonds typically cost €15,016 EUR to €39,326 EUR, with a median price of €25,588 EUR. There are currently 23 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 42%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI2 Natural Princess

Quick answer

As of November 2026, there are 23 natural princess diamonds with I color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €15,016 EUR to €39,326 EUR, with a median of €25,588 EUR. At least 44 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between €5,166 EUR and €7,840 EUR per carat. The same specification in lab grown form lists at a median of about €736 EUR per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +4.4%.

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: November 2026

Available

Lowest Price

€9,627 EUR

Highest Price

€58,534 EUR

Average Price

€25,907 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

30.0%

Price Spread

42.4%

30-Day Price Trend

-1.0%

30-Day Supply Change

+4.4%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$7,048/ct

10th Percentile

$4,534

Median

$7,048

90th Percentile

$10,901

Score Distribution

54 diamonds scored across 4 quality tiers

Excellent

11 (20.4%)

Very Good

12 (22.2%)

Good

6 (11.1%)

Average

25 (46.3%)

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Consider Instead

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

J SI2J colour is visually identical to I to the naked eye

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Lab-Grown I SI2Same specifications, lab-grown origin

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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