How much does a 0.20 to 0.49ct E SI1 natural heart diamond cost?

As of October 2026, 0.20 to 0.49ct E SI1 natural heart diamonds typically cost $483 AUD to $1,026 AUD, with a median price of $712 AUD. There are currently 311 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 24%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct E SI1 Natural Heart

Quick answer

As of October 2026, there are 311 natural heart diamonds with E colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $483 AUD to $1,026 AUD, with a median of $712 AUD. At least 21 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 24%. Half of all listings fall between $2,049 AUD and $2,582 AUD per carat. The same specification in lab grown form lists at a median of about $653 AUD per carat. Over the last 30 days the median price moved -6.9% and the number of listings moved -1.0%.

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. 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

311

Lowest Price

$255 AUD

Highest Price

$2,412 AUD

Average Price

$750 AUD