How much does a 0.50 to 0.74ct G SI2 natural round diamond cost?

As of October 2026, 0.50 to 0.74ct G SI2 natural round diamonds typically cost $536 USD to $1,725 USD, with a median price of $928 USD. There are currently 8,518 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 56%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct G SI2 Natural Round

Quick answer

As of October 2026, there are 8,518 natural round diamonds with G color and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $536 USD to $1,725 USD, with a median of $928 USD. At least 61 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 56%. Half of all listings fall between $1,223 USD and $2,075 USD per carat. The same specification in lab grown form lists at a median of about $1,199 USD per carat. Over the last 30 days the median price moved -2.8% and the number of listings moved +12.5%.

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

8,518

Lowest Price

$244 USD

Highest Price

$3,538 USD

Average Price

$1,044 USD