How much does a 0.50 to 0.74ct I SI2 natural princess diamond cost?

As of October 2026, 0.50 to 0.74ct I SI2 natural princess diamonds typically cost $445 USD to $864 USD, with a median price of $620 USD. There are currently 258 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 28%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I SI2 Natural Princess

Quick answer

As of October 2026, there are 258 natural princess diamonds with I color and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $445 USD to $864 USD, with a median of $620 USD. At least 41 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 28%. Half of all listings fall between $874 USD and $1,151 USD per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved +53.9%.

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: October 2026

Available

258

Lowest Price

$335 USD

Highest Price

$1,542 USD

Average Price

$669 USD

Market Intelligence

Retailers Selling

Cross Retailer %

40.1%

Price Spread

28.0%

30-Day Price Trend

-2.0%

30-Day Supply Change

+53.9%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$986/ct

10th Percentile

$790

Median

$986

90th Percentile

$1,378

Score Distribution

564 diamonds scored across 4 quality tiers

Excellent

25 (4.4%)

Very Good

200 (35.5%)

Good

54 (9.6%)

Average

285 (50.5%)

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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