How much does a 1.50 to 1.99ct I SI1 natural asscher diamond cost?

As of October 2026, 1.50 to 1.99ct I SI1 natural asscher diamonds typically cost HK$25,739 HKD to HK$65,168 HKD, with a median price of HK$42,488 HKD. There are currently 67 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I SI1 Natural Asscher

Quick answer

As of October 2026, there are 67 natural asscher diamonds with I colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$25,739 HKD to HK$65,168 HKD, with a median of HK$42,488 HKD. At least 54 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between HK$23,608 HKD and HK$38,199 HKD per carat. The same specification in lab grown form lists at a median of about HK$7,105 HKD per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +11.8%.

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. Asscher natural stones in the index: 2,504 USD per carat, -3.3% 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

Lowest Price

HK$17,976 HKD

Highest Price

HK$121,988 HKD

Average Price

HK$45,503 HKD