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

As of October 2026, 3.00 to 4.99ct G SI2 natural round diamonds typically cost €17,568 EUR to €57,039 EUR, with a median price of €33,990 EUR. There are currently 362 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 46%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI2 Natural Round

Quick answer

As of October 2026, there are 362 natural round diamonds with G color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €17,568 EUR to €57,039 EUR, with a median of €33,990 EUR. At least 57 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 46%. Half of all listings fall between €7,838 EUR and €12,472 EUR per carat. The same specification in lab grown form lists at a median of about €327 EUR per carat. Over the last 30 days the median price moved -1.7% and the number of listings moved +12.0%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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: October 2026

Available

362

Lowest Price

€9,002 EUR

Highest Price

€114,805 EUR

Average Price

€36,696 EUR