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

As of October 2026, 0.75 to 0.99ct E SI2 natural round diamonds typically cost $1,602 AUD to $4,863 AUD, with a median price of $2,697 AUD. There are currently 1,604 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 63%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct E SI2 Natural Round

Quick answer

As of October 2026, there are 1,604 natural round diamonds with E colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,602 AUD to $4,863 AUD, with a median of $2,697 AUD. At least 60 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 63%. Half of all listings fall between $2,539 AUD and $4,576 AUD per carat. The same specification in lab grown form lists at a median of about $698 AUD per carat. Over the last 30 days the median price moved -1.6% and the number of listings moved +6.0%.

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

1,604

Lowest Price

$888 AUD

Highest Price

$10,694 AUD

Average Price

$3,007 AUD