How much does a 1.00 to 1.49ct E SI2 natural round diamond cost?

As of November 2026, 1.00 to 1.49ct E SI2 natural round diamonds typically cost €1,652 EUR to €5,308 EUR, with a median price of €2,751 EUR. There are currently 2,969 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 61%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct E SI2 Natural Round

Quick answer

As of November 2026, there are 2,969 natural round diamonds with E color and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,652 EUR to €5,308 EUR, with a median of €2,751 EUR. At least 61 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 61%. Half of all listings fall between €2,086 EUR and €3,676 EUR per carat. The same specification in lab grown form lists at a median of about €433 EUR per carat. Over the last 30 days the median price moved -0.7% and the number of listings moved +7.9%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

2,969

Lowest Price

€994 EUR

Highest Price

€14,863 EUR

Average Price

€3,177 EUR