How much does a 3.00 to 4.99ct I SI1 natural asscher diamond cost?

As of October 2026, 3.00 to 4.99ct I SI1 natural asscher diamonds typically cost $31,155 AUD to $78,796 AUD, with a median price of $45,121 AUD. There are currently 22 diamonds matching this specification available across retailers.

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

About 50% of these diamonds are available at multiple retailers, with an average price spread of 32%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI1 Natural Asscher

Quick answer

As of October 2026, there are 22 natural asscher diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $31,155 AUD to $78,796 AUD, with a median of $45,121 AUD. At least 37 retailers stock this exact specification, and 50% of the stones appear at more than one of them, with an average price spread of 32%. Half of all listings fall between $9,827 AUD and $13,576 AUD per carat. The same specification in lab grown form lists at a median of about $1,448 AUD per carat. Over the last 30 days the median price moved -4.2% and the number of listings moved +14.1%.

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. Asscher natural stones in the index: 2,504 USD per carat, -3.3% 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

$27,319 AUD

Highest Price

$139,339 AUD

Average Price

$49,620 AUD