How much does a 0.20 to 0.49ct I SI1 natural emerald diamond cost?

As of October 2026, 0.20 to 0.49ct I SI1 natural emerald diamonds typically cost $333 AUD to $701 AUD, with a median price of $459 AUD. There are currently 248 diamonds matching this specification available across retailers.

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

About 43% 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.

0.20 to 0.49ct I SI1 Natural Emerald

Quick answer

As of October 2026, there are 248 natural emerald diamonds with I colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $333 AUD to $701 AUD, with a median of $459 AUD. At least 19 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between $1,374 AUD and $1,882 AUD per carat. The same specification in lab grown form lists at a median of about $911 AUD per carat. Over the last 30 days the median price moved -6.8% and the number of listings moved +69.3%.

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. Emerald natural stones in the index: 2,278 USD per carat, +6.2% 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

248

Lowest Price

$225 AUD

Highest Price

$1,640 AUD

Average Price

$503 AUD