How much does a 2.00 to 2.99ct I SI1 natural princess diamond cost?

As of September 2026, 2.00 to 2.99ct I SI1 natural princess diamonds typically cost £4,792 GBP to £13,451 GBP, with a median price of £7,747 GBP. There are currently 287 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

2.00 to 2.99ct I SI1 Natural Princess

Quick answer

As of September 2026, there are 287 natural princess diamonds with I colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £4,792 GBP to £13,451 GBP, with a median of £7,747 GBP. At least 49 retailers stock this exact specification. Half of all listings fall between £3,324 GBP and £5,196 GBP per carat. The same specification in lab grown form lists at a median of about £905 GBP 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

287

Lowest Price

£2,999 GBP

Highest Price

£26,957 GBP

Average Price

£8,500 GBP