How much does a 3.00 to 4.99ct G SI2 natural marquise diamond cost?

As of November 2026, 3.00 to 4.99ct G SI2 natural marquise diamonds typically cost €17,846 EUR to €47,542 EUR, with a median price of €34,527 EUR. There are currently 48 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 33%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI2 Natural Marquise

Quick answer

As of November 2026, there are 48 natural marquise diamonds with G color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €17,846 EUR to €47,542 EUR, with a median of €34,527 EUR. At least 50 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between €9,731 EUR and €13,755 EUR per carat. The same specification in lab grown form lists at a median of about €384 EUR per carat. Over the last 30 days the median price moved -1.7% and the number of listings moved +33.9%.

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

€13,086 EUR

Highest Price

€85,832 EUR

Average Price

€34,290 EUR