How much does a 2.00 to 2.99ct I SI2 natural radiant diamond cost?

As of October 2026, 2.00 to 2.99ct I SI2 natural radiant diamonds typically cost $6,708 USD to $23,807 USD, with a median price of $11,369 USD. There are currently 128 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI2 radiant diamond?

About 34% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI2 Natural Radiant

Quick answer

As of October 2026, there are 128 natural radiant diamonds with I color and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $6,708 USD to $23,807 USD, with a median of $11,369 USD. At least 52 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between $4,399 USD and $6,578 USD per carat. The same specification in lab grown form lists at a median of about $395 USD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +20.8%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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: October 2026

Available

128

Lowest Price

$4,097 USD

Highest Price

$35,570 USD

Average Price

$13,971 USD