How much does a 3.00 to 4.99ct E SI1 natural marquise diamond cost?

As of November 2026, 3.00 to 4.99ct E SI1 natural marquise diamonds typically cost HK$336,184 HKD to HK$591,837 HKD, with a median price of HK$435,107 HKD. There are currently 12 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 21%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct E SI1 Natural Marquise

Quick answer

As of November 2026, there are 12 natural marquise diamonds with E colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$336,184 HKD to HK$591,837 HKD, with a median of HK$435,107 HKD. At least 53 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 21%. Half of all listings fall between HK$129,845 HKD and HK$160,665 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,228 HKD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +11.2%.

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

HK$297,961 HKD

Highest Price

HK$1,070,546 HKD

Average Price

HK$448,907 HKD