How much does a 2.00 to 2.99ct G SI1 natural marquise diamond cost?

As of November 2026, 2.00 to 2.99ct G SI1 natural marquise diamonds typically cost $15,440 USD to $45,248 USD, with a median price of $22,091 USD. There are currently 72 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 25%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct G SI1 Natural Marquise

Quick answer

As of November 2026, there are 72 natural marquise diamonds with G color and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $15,440 USD to $45,248 USD, with a median of $22,091 USD. At least 60 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 25%. Half of all listings fall between $10,179 USD and $13,093 USD per carat. The same specification in lab grown form lists at a median of about $537 USD per carat. Over the last 30 days the median price moved -2.8% and the number of listings moved +21.1%.

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

$10,751 USD

Highest Price

$79,296 USD

Average Price

$27,412 USD