How much does a 5.00ct+ I SI2 natural princess diamond cost?

As of September 2026, 5.00ct+ I SI2 natural princess diamonds typically cost €26,041 EUR to €49,959 EUR, with a median price of €38,879 EUR. There are currently 10 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ I SI2 Natural Princess

Quick answer

As of September 2026, there are 10 natural princess diamonds with I colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run €26,041 EUR to €49,959 EUR, with a median of €38,879 EUR. At least 14 retailers stock this exact specification. Half of all listings fall between €7,695 EUR and €11,584 EUR per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Princess natural stones in the index: 2,073 USD per carat, -3.2% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

€15,834 EUR

Highest Price

€72,344 EUR

Average Price

€39,388 EUR

Market Intelligence

Retailers Selling

Price Spread

37.0%

Price Range

Price per carat distribution across retailers

$12,141/ct

10th Percentile

$5,863

Median

$12,141

90th Percentile

$13,849

Score Distribution

10 diamonds scored across 3 quality tiers

Very Good

4 (40.0%)

Good

3 (30.0%)

Average

3 (30.0%)

Find Your Diamond

Search 10 I SI2 princess diamonds and compare prices.

Search Diamonds

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

Save 28%

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