How much does a 5.00ct+ G SI2 natural round diamond cost?

As of September 2026, 5.00ct+ G SI2 natural round diamonds typically cost HK$344,106 HKD to HK$1,434,940 HKD, with a median price of HK$658,578 HKD. There are currently 208 diamonds matching this specification available across retailers.

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

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

5.00ct+ G SI2 Natural Round

Quick answer

As of September 2026, there are 208 natural round diamonds with G colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$344,106 HKD to HK$1,434,940 HKD, with a median of HK$658,578 HKD. At least 8 retailers stock this exact specification. Half of all listings fall between HK$147,079 HKD and HK$184,514 HKD per carat. The same specification in lab grown form lists at a median of about HK$2,274 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

208

Lowest Price

HK$222,465 HKD

Highest Price

HK$2,885,456 HKD

Average Price

HK$782,533 HKD