How much does a 1.00 to 1.49ct E SI1 natural marquise diamond cost?

As of November 2026, 1.00 to 1.49ct E SI1 natural marquise diamonds typically cost €2,750 EUR to €6,656 EUR, with a median price of €3,742 EUR. There are currently 244 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 42%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct E SI1 Natural Marquise

Quick answer

As of November 2026, there are 244 natural marquise diamonds with E colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €2,750 EUR to €6,656 EUR, with a median of €3,742 EUR. At least 62 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between €3,257 EUR and €4,845 EUR per carat. The same specification in lab grown form lists at a median of about €350 EUR per carat. Over the last 30 days the median price moved +1.1% and the number of listings moved +15.0%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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

244

Lowest Price

€1,946 EUR

Highest Price

€17,390 EUR

Average Price

€4,455 EUR