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

As of November 2026, 3.00 to 4.99ct I SI1 natural princess diamonds typically cost $31,359 NZD to $79,137 NZD, with a median price of $53,932 NZD. There are currently 44 diamonds matching this specification available across retailers.

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

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

3.00 to 4.99ct I SI1 Natural Princess

Quick answer

As of November 2026, there are 44 natural princess diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $31,359 NZD to $79,137 NZD, with a median of $53,932 NZD. At least 52 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 36%. Half of all listings fall between $13,609 NZD and $19,334 NZD per carat. The same specification in lab grown form lists at a median of about $778 NZD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +5.7%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Princess natural stones in the index: 1,991 USD per carat, -8.2% 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: November 2026

Available

Lowest Price

$18,399 NZD

Highest Price

$131,235 NZD

Average Price

$54,815 NZD