How much does a 1.50 to 1.99ct E SI1 natural cushion diamond cost?

As of November 2026, 1.50 to 1.99ct E SI1 natural cushion diamonds typically cost €3,928 EUR to €11,692 EUR, with a median price of €6,987 EUR. There are currently 216 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E SI1 Natural Cushion

Quick answer

As of November 2026, there are 216 natural cushion diamonds with E color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €3,928 EUR to €11,692 EUR, with a median of €6,987 EUR. At least 59 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between €3,449 EUR and €5,938 EUR per carat. The same specification in lab grown form lists at a median of about €385 EUR per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved +3.8%.

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: November 2026

Available

216

Lowest Price

€2,732 EUR

Highest Price

€22,660 EUR

Average Price

€7,561 EUR