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

As of November 6, 2026, 2.00 to 2.99ct G SI1 natural marquise diamonds typically cost €13,582 EUR to €40,876 EUR, with a median price of €20,331 EUR. There are currently 185 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct G SI1 Natural Marquise

Quick answer

As of November 6, 2026, there are 185 natural marquise diamonds with G colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run €13,582 EUR to €40,876 EUR, with a median of €20,331 EUR. Half of all listings fall between €7,865 EUR and €13,079 EUR per carat. The same specification in lab grown form lists at a median of about €517 EUR per carat. Over the last 30 days the median price moved -3.3% and the number of listings moved +22.3%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

185

Lowest Price

€9,801 EUR

Highest Price

€70,649 EUR

Average Price

€24,819 EUR