How much does a 3.00 to 4.99ct H SI1 natural princess diamond cost?

As of October 2026, 3.00 to 4.99ct H SI1 natural princess diamonds typically cost $29,378 AUD to $75,236 AUD, with a median price of $47,569 AUD. There are currently 38 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI1 princess diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 35%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct H SI1 Natural Princess

Quick answer

As of October 2026, there are 38 natural princess diamonds with H colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $29,378 AUD to $75,236 AUD, with a median of $47,569 AUD. At least 52 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 35%. Half of all listings fall between $10,941 AUD and $15,451 AUD per carat. The same specification in lab grown form lists at a median of about $649 AUD 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

$21,137 AUD

Highest Price

$126,226 AUD

Average Price

$48,985 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

35.5%

Price Spread

35.3%

30-Day Price Trend

-1.3%

30-Day Supply Change

+4.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$8,966/ct

10th Percentile

$6,536

Median

$8,966

90th Percentile

$12,343

Score Distribution

112 diamonds scored across 4 quality tiers

Excellent

15 (13.4%)

Very Good

22 (19.6%)

Good

23 (20.5%)

Average

52 (46.4%)

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Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

Save 21%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 94%

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