How much does a 5.00ct+ I VS1 natural marquise diamond cost?

As of September 2026, 5.00ct+ I VS1 natural marquise diamonds typically cost HK$720,964 HKD to HK$2,102,488 HKD, with a median price of HK$1,278,001 HKD. There are currently 14 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 marquise diamond?

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

5.00ct+ I VS1 Natural Marquise

Quick answer

As of September 2026, there are 14 natural marquise diamonds with I colour and VS1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$720,964 HKD to HK$2,102,488 HKD, with a median of HK$1,278,001 HKD. At least 9 retailers stock this exact specification. Half of all listings fall between HK$117,358 HKD and HK$185,795 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,208 HKD 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

Lowest Price

HK$613,879 HKD

Highest Price

HK$2,311,235 HKD

Average Price

HK$1,377,863 HKD