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

As of November 2026, 2.00 to 2.99ct I SI1 natural cushion diamonds typically cost €6,155 EUR to €19,299 EUR, with a median price of €10,862 EUR. There are currently 340 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 49%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI1 Natural Cushion

Quick answer

As of November 2026, there are 340 natural cushion diamonds with I color and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run €6,155 EUR to €19,299 EUR, with a median of €10,862 EUR. At least 56 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 49%. Half of all listings fall between €4,016 EUR and €6,545 EUR per carat. The same specification in lab grown form lists at a median of about €969 EUR per carat. Over the last 30 days the median price moved -1.2% and the number of listings moved +4.8%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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: November 2026

Available

340

Lowest Price

€3,265 EUR

Highest Price

€42,696 EUR

Average Price

€12,139 EUR