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

As of November 2026, 2.00 to 2.99ct I SI1 natural marquise diamonds typically cost €12,662 EUR to €39,255 EUR, with a median price of €19,372 EUR. There are currently 60 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 26%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI1 Natural Marquise

Quick answer

As of November 2026, there are 60 natural marquise diamonds with I color and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run €12,662 EUR to €39,255 EUR, with a median of €19,372 EUR. At least 58 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 26%. Half of all listings fall between €7,460 EUR and €9,659 EUR per carat. The same specification in lab grown form lists at a median of about €586 EUR per carat. Over the last 30 days the median price moved -3.9% and the number of listings moved +27.3%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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

Lowest Price

€6,121 EUR

Highest Price

€58,010 EUR

Average Price

€23,302 EUR