How much does a 1.50 to 1.99ct G SI1 natural radiant diamond cost?

As of October 2026, 1.50 to 1.99ct G SI1 natural radiant diamonds typically cost HK$40,049 HKD to HK$103,706 HKD, with a median price of HK$64,436 HKD. There are currently 165 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 radiant diamond?

About 37% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI1 Natural Radiant

Quick answer

As of October 2026, there are 165 natural radiant diamonds with G colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$40,049 HKD to HK$103,706 HKD, with a median of HK$64,436 HKD. At least 62 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between HK$33,514 HKD and HK$53,457 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,427 HKD per carat. Over the last 30 days the median price moved -2.2% and the number of listings moved +17.9%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

165

Lowest Price

HK$18,452 HKD

Highest Price

HK$195,525 HKD

Average Price

HK$68,703 HKD