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

As of September 2026, 2.00 to 2.99ct I SI1 natural round diamonds typically cost $9,165 USD to $22,695 USD, with a median price of $13,850 USD. There are currently 2,361 diamonds matching this specification available across retailers.

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

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

2.00 to 2.99ct I SI1 Natural Round

Quick answer

As of September 2026, there are 2,361 natural round diamonds with I color and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $9,165 USD to $22,695 USD, with a median of $13,850 USD. At least 59 retailers stock this exact specification. Half of all listings fall between $5,976 USD and $8,817 USD per carat. The same specification in lab grown form lists at a median of about $1,557 USD 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

2,361

Lowest Price

$4,971 USD

Highest Price

$53,740 USD

Average Price

$15,067 USD