How much does a 2.00 to 2.99ct I SI1 natural heart diamond cost?

As of October 2026, 2.00 to 2.99ct I SI1 natural heart diamonds typically cost $11,314 AUD to $44,962 AUD, with a median price of $18,842 AUD. There are currently 93 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI1 Natural Heart

Quick answer

As of October 2026, there are 93 natural heart diamonds with I colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $11,314 AUD to $44,962 AUD, with a median of $18,842 AUD. At least 58 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between $6,342 AUD and $9,393 AUD per carat. The same specification in lab grown form lists at a median of about $2,141 AUD per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +17.1%.

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. Heart natural stones in the index: 2,374 USD per carat, +9.8% 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

$6,361 AUD

Highest Price

$69,258 AUD

Average Price

$23,913 AUD