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 £282 GBP to £1,301 GBP, with a median price of £520 GBP. There are currently 124 diamonds matching this specification available across retailers.

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

About 30% 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 124 natural cushion diamonds with E colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £282 GBP to £1,301 GBP, with a median of £520 GBP. At least 46 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between £734 GBP and £1,512 GBP per carat. The same specification in lab grown form lists at a median of about £555 GBP per carat. Over the last 30 days the median price moved -2.9% and the number of listings moved +5.0%.

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

124

Lowest Price

£240 GBP

Highest Price

£2,602 GBP

Average Price

£670 GBP