How much does a 2.00 to 2.99ct I SI2 natural marquise diamond cost?

As of September 2026, 2.00 to 2.99ct I SI2 natural marquise diamonds typically cost $7,102 USD to $22,685 USD, with a median price of $14,045 USD. There are currently 384 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

2.00 to 2.99ct I SI2 Natural Marquise

Quick answer

As of September 2026, there are 384 natural marquise diamonds with I color and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $7,102 USD to $22,685 USD, with a median of $14,045 USD. At least 44 retailers stock this exact specification. Half of all listings fall between $5,621 USD and $8,807 USD per carat. The same specification in lab grown form lists at a median of about $4,521 USD 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

384

Lowest Price

$4,747 USD

Highest Price

$64,771 USD

Average Price

$15,148 USD