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

As of September 2026, 1.00 to 1.49ct E SI1 natural marquise diamonds typically cost €2,724 EUR to €6,495 EUR, with a median price of €3,879 EUR. There are currently 599 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct E SI1 Natural Marquise

Quick answer

As of September 2026, there are 599 natural marquise diamonds with E colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €2,724 EUR to €6,495 EUR, with a median of €3,879 EUR. At least 59 retailers stock this exact specification. Half of all listings fall between €3,182 EUR and €4,544 EUR per carat. The same specification in lab grown form lists at a median of about €308 EUR per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise natural stones in the index: 2,114 USD per carat, -8.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

599

Lowest Price

€1,074 EUR

Highest Price

€21,931 EUR

Average Price

€4,318 EUR