How much does a 5.00ct+ F SI2 natural marquise diamond cost?

As of September 2026, 5.00ct+ F SI2 natural marquise diamonds typically cost $87,796 SGD to $140,865 SGD, with a median price of $120,206 SGD. There are currently 4 diamonds matching this specification available across retailers.

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

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

5.00ct+ F SI2 Natural Marquise

Quick answer

As of September 2026, there are 4 natural marquise diamonds with F colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $87,796 SGD to $140,865 SGD, with a median of $120,206 SGD. At least 8 retailers stock this exact specification. Half of all listings fall between $18,096 SGD and $28,049 SGD per carat. The same specification in lab grown form lists at a median of about $378 SGD per carat.

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

5.00ct Marquise F SI2, GIA, score 75 of 100, from $80,431 SGD

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

Lowest Price

$80,431 SGD

Highest Price

$143,194 SGD

Average Price

$116,009 SGD