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

As of October 2026, 0.75 to 0.99ct G SI1 natural princess diamonds typically cost $922 USD to $3,067 USD, with a median price of $1,413 USD. There are currently 266 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 76%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct G SI1 Natural Princess

Quick answer

As of October 2026, there are 266 natural princess diamonds with G color and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $922 USD to $3,067 USD, with a median of $1,413 USD. At least 62 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 76%. Half of all listings fall between $1,279 USD and $2,550 USD per carat. The same specification in lab grown form lists at a median of about $420 USD per carat. Over the last 30 days the median price moved -7.3% and the number of listings moved +15.5%.

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

266

Lowest Price

$742 USD

Highest Price

$5,729 USD

Average Price

$1,750 USD