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

As of November 2026, 1.50 to 1.99ct E SI1 natural marquise diamonds typically cost €8,235 EUR to €24,966 EUR, with a median price of €12,066 EUR. There are currently 61 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 33%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E SI1 Natural Marquise

Quick answer

As of November 2026, there are 61 natural marquise diamonds with E color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €8,235 EUR to €24,966 EUR, with a median of €12,066 EUR. At least 62 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between €6,392 EUR and €8,849 EUR per carat. The same specification in lab grown form lists at a median of about €374 EUR per carat. Over the last 30 days the median price moved -0.9% and the number of listings moved +13.0%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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

Lowest Price

€5,532 EUR

Highest Price

€31,078 EUR

Average Price

€14,281 EUR