How much does a 5.00ct+ G SI1 natural cushion diamond cost?

As of November 2026, 5.00ct+ G SI1 natural cushion diamonds typically cost €58,819 EUR to €138,092 EUR, with a median price of €91,793 EUR. There are currently 35 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 36%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ G SI1 Natural Cushion

Quick answer

As of November 2026, there are 35 natural cushion diamonds with G color and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run €58,819 EUR to €138,092 EUR, with a median of €91,793 EUR. At least 43 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 36%. Half of all listings fall between €14,598 EUR and €21,201 EUR per carat. The same specification in lab grown form lists at a median of about €279 EUR per carat. Over the last 30 days the median price moved 0.0% and the number of listings moved -1.1%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

€33,849 EUR

Highest Price

€246,778 EUR

Average Price

€95,916 EUR