How much does a 0.75 to 0.99ct G SI2 natural round diamond cost?

As of October 2026, 0.75 to 0.99ct G SI2 natural round diamonds typically cost $1,024 USD to $2,975 USD, with a median price of $1,690 USD. There are currently 2,448 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct G SI2 Natural Round

Quick answer

As of October 2026, there are 2,448 natural round diamonds with G color and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,024 USD to $2,975 USD, with a median of $1,690 USD. At least 60 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $1,547 USD and $2,631 USD per carat. The same specification in lab grown form lists at a median of about $688 USD per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved +10.9%.

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. 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

2,448

Lowest Price

$515 USD

Highest Price

$6,290 USD

Average Price

$1,866 USD