How much does a 3.00 to 4.99ct G SI2 natural marquise diamond cost?

As of October 2026, 3.00 to 4.99ct G SI2 natural marquise diamonds typically cost $27,645 CAD to $73,586 CAD, with a median price of $53,989 CAD. There are currently 49 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 34%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI2 Natural Marquise

Quick answer

As of October 2026, there are 49 natural marquise diamonds with G color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $27,645 CAD to $73,586 CAD, with a median of $53,989 CAD. At least 48 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 34%. Half of all listings fall between $14,652 CAD and $21,128 CAD per carat. The same specification in lab grown form lists at a median of about $600 CAD per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +34.7%.

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: October 2026

Available

Lowest Price

$20,462 CAD

Highest Price

$134,211 CAD

Average Price

$53,596 CAD