How much does a 2.00 to 2.99ct G SI1 natural round diamond cost?

As of October 2026, 2.00 to 2.99ct G SI1 natural round diamonds typically cost $19,551 AUD to $49,731 AUD, with a median price of $30,688 AUD. There are currently 655 diamonds matching this specification available across retailers.

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

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

2.00 to 2.99ct G SI1 Natural Round

Quick answer

As of October 2026, there are 655 natural round diamonds with G colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $19,551 AUD to $49,731 AUD, with a median of $30,688 AUD. At least 66 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between $11,472 AUD and $15,853 AUD per carat. The same specification in lab grown form lists at a median of about $519 AUD per carat. Over the last 30 days the median price moved -1.6% and the number of listings moved +10.0%.

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

655

Lowest Price

$8,077 AUD

Highest Price

$88,137 AUD

Average Price

$32,611 AUD