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

As of September 2026, 5.00ct+ G SI1 natural round diamonds typically cost $71,709 USD to $221,799 USD, with a median price of $116,505 USD. There are currently 170 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ G SI1 Natural Round

Quick answer

As of September 2026, there are 170 natural round diamonds with G color and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $71,709 USD to $221,799 USD, with a median of $116,505 USD. At least 13 retailers stock this exact specification. Half of all listings fall between $25,255 USD and $33,167 USD per carat. The same specification in lab grown form lists at a median of about $391 USD 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

170

Lowest Price

$38,839 USD

Highest Price

$643,353 USD

Average Price

$134,019 USD