How much does a 0.50 to 0.74ct E SI2 natural cushion diamond cost?

As of October 2026, 0.50 to 0.74ct E SI2 natural cushion diamonds typically cost $535 AUD to $2,466 AUD, with a median price of $988 AUD. There are currently 126 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 81%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E SI2 Natural Cushion

Quick answer

As of October 2026, there are 126 natural cushion diamonds with E colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $535 AUD to $2,466 AUD, with a median of $988 AUD. At least 46 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between $1,390 AUD and $2,860 AUD per carat. The same specification in lab grown form lists at a median of about $1,050 AUD per carat. Over the last 30 days the median price moved -3.0% and the number of listings moved +4.9%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

126

Lowest Price

$455 AUD

Highest Price

$4,933 AUD

Average Price

$1,271 AUD