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

As of October 2026, 0.75 to 0.99ct G SI2 natural radiant diamonds typically cost $1,544 AUD to $4,028 AUD, with a median price of $2,438 AUD. There are currently 55 diamonds matching this specification available across retailers.

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

About 22% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct G SI2 Natural Radiant

Quick answer

As of October 2026, there are 55 natural radiant diamonds with G colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,544 AUD to $4,028 AUD, with a median of $2,438 AUD. At least 49 retailers stock this exact specification, and 22% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between $2,005 AUD and $3,463 AUD per carat. The same specification in lab grown form lists at a median of about $628 AUD per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved +8.4%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

Lowest Price

$1,098 AUD

Highest Price

$8,451 AUD

Average Price

$2,675 AUD