How much does a 3.00 to 4.99ct E SI1 natural cushion diamond cost?

As of October 2026, 3.00 to 4.99ct E SI1 natural cushion diamonds typically cost $37,689 SGD to $105,763 SGD, with a median price of $60,511 SGD. There are currently 93 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 34%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct E SI1 Natural Cushion

Quick answer

As of October 2026, there are 93 natural cushion diamonds with E colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $37,689 SGD to $105,763 SGD, with a median of $60,511 SGD. At least 54 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 34%. Half of all listings fall between $16,076 SGD and $22,713 SGD per carat. The same specification in lab grown form lists at a median of about $509 SGD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +10.2%.

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

Lowest Price

$26,075 SGD

Highest Price

$180,433 SGD

Average Price

$65,623 SGD