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

As of September 2026, 3.00 to 4.99ct J SI1 natural princess diamonds typically cost $19,085 AUD to $48,058 AUD, with a median price of $29,665 AUD. There are currently 66 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct J SI1 Natural Princess

Quick answer

As of September 2026, there are 66 natural princess diamonds with J colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $19,085 AUD to $48,058 AUD, with a median of $29,665 AUD. At least 43 retailers stock this exact specification. Half of all listings fall between $7,130 AUD and $10,894 AUD per carat. The same specification in lab grown form lists at a median of about $2,829 AUD 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

$13,212 AUD

Highest Price

$75,079 AUD

Average Price

$31,955 AUD

Market Intelligence

Retailers Selling

Price Spread

43.9%

Price Range

Price per carat distribution across retailers

$6,145/ct

10th Percentile

$4,537

Median

$6,145

90th Percentile

$9,606

Score Distribution

66 diamonds scored across 4 quality tiers

Excellent

7 (10.6%)

Very Good

17 (25.8%)

Good

16 (24.2%)

Average

26 (39.4%)

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Consider Instead

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

Lab-Grown J SI1Same specifications, lab-grown origin

Save 70%

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