How much does a 3.00 to 4.99ct E SI2 natural cushion diamond cost?

As of September 2026, 3.00 to 4.99ct E SI2 natural cushion diamonds typically cost $32,801 AUD to $72,150 AUD, with a median price of $49,005 AUD. There are currently 85 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

3.00 to 4.99ct E SI2 Natural Cushion

Quick answer

As of September 2026, there are 85 natural cushion diamonds with E colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $32,801 AUD to $72,150 AUD, with a median of $49,005 AUD. At least 39 retailers stock this exact specification. Half of all listings fall between $14,836 AUD and $21,591 AUD per carat. The same specification in lab grown form lists at a median of about $992 AUD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$16,712 AUD

Highest Price

$167,618 AUD

Average Price

$52,639 AUD