How much does a 2.00 to 2.99ct E SI1 natural cushion diamond cost?

As of October 2026, 2.00 to 2.99ct E SI1 natural cushion diamonds typically cost £7,438 GBP to £23,274 GBP, with a median price of £12,972 GBP. There are currently 228 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 45%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct E SI1 Natural Cushion

Quick answer

As of October 2026, there are 228 natural cushion diamonds with E colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £7,438 GBP to £23,274 GBP, with a median of £12,972 GBP. At least 57 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 45%. Half of all listings fall between £4,693 GBP and £7,343 GBP per carat. The same specification in lab grown form lists at a median of about £298 GBP per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved +9.9%.

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

228

Lowest Price

£4,767 GBP

Highest Price

£50,491 GBP

Average Price

£14,824 GBP