How much does a 0.75 to 0.99ct E SI1 natural princess diamond cost?

As of October 2026, 0.75 to 0.99ct E SI1 natural princess diamonds typically cost $1,338 AUD to $4,517 AUD, with a median price of $2,098 AUD. There are currently 286 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 81%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct E SI1 Natural Princess

Quick answer

As of October 2026, there are 286 natural princess diamonds with E colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,338 AUD to $4,517 AUD, with a median of $2,098 AUD. At least 61 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between $1,976 AUD and $4,094 AUD per carat. The same specification in lab grown form lists at a median of about $528 AUD per carat. Over the last 30 days the median price moved -8.3% and the number of listings moved +16.4%.

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

286

Lowest Price

$1,039 AUD

Highest Price

$9,205 AUD

Average Price

$2,629 AUD