How much does a 1.50 to 1.99ct E SI2 natural round diamond cost?

As of November 2026, 1.50 to 1.99ct E SI2 natural round diamonds typically cost €3,644 EUR to €12,191 EUR, with a median price of €6,358 EUR. There are currently 1,000 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E SI2 Natural Round

Quick answer

As of November 2026, there are 1,000 natural round diamonds with E color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €3,644 EUR to €12,191 EUR, with a median of €6,358 EUR. At least 58 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between €3,500 EUR and €5,774 EUR per carat. The same specification in lab grown form lists at a median of about €379 EUR per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved +11.9%.

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

1,000

Lowest Price

€1,803 EUR

Highest Price

€24,782 EUR

Average Price

€7,236 EUR