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

As of September 2026, 3.00 to 4.99ct G SI2 natural marquise diamonds typically cost €16,611 EUR to €48,967 EUR, with a median price of €31,911 EUR. There are currently 97 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct G SI2 Natural Marquise

Quick answer

As of September 2026, there are 97 natural marquise diamonds with G colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €16,611 EUR to €48,967 EUR, with a median of €31,911 EUR. At least 43 retailers stock this exact specification. Half of all listings fall between €9,531 EUR and €13,788 EUR per carat. The same specification in lab grown form lists at a median of about €356 EUR per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise natural stones in the index: 2,114 USD per carat, -8.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

€14,492 EUR

Highest Price

€73,668 EUR

Average Price

€32,416 EUR