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

As of October 2026, 3.00 to 4.99ct I SI2 natural princess diamonds typically cost $21,344 CAD to $60,870 CAD, with a median price of $39,525 CAD. There are currently 28 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 43%. 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 October 2026, there are 28 natural princess diamonds with I color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $21,344 CAD to $60,870 CAD, with a median of $39,525 CAD. At least 45 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 43%. Half of all listings fall between $8,207 CAD and $12,459 CAD per carat. The same specification in lab grown form lists at a median of about $957 CAD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +4.3%.

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

Lowest Price

$15,053 CAD

Highest Price

$91,527 CAD

Average Price

$39,680 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

29.4%

Price Spread

43.0%

30-Day Price Trend

-1.3%

30-Day Supply Change

+4.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$7,060/ct

10th Percentile

$4,618

Median

$7,060

90th Percentile

$11,119

Score Distribution

63 diamonds scored across 4 quality tiers

Excellent

14 (22.2%)

Very Good

16 (25.4%)

Good

8 (12.7%)

Average

25 (39.7%)

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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

Save 90%

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