How much does a 0.50 to 0.74ct I SI1 natural princess diamond cost?

As of October 2026, 0.50 to 0.74ct I SI1 natural princess diamonds typically cost HK$3,626 HKD to HK$6,882 HKD, with a median price of HK$4,943 HKD. There are currently 367 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 25%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I SI1 Natural Princess

Quick answer

As of October 2026, there are 367 natural princess diamonds with I colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run HK$3,626 HKD to HK$6,882 HKD, with a median of HK$4,943 HKD. At least 58 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 25%. Half of all listings fall between HK$7,565 HKD and HK$9,727 HKD per carat. The same specification in lab grown form lists at a median of about HK$6,401 HKD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +50.7%.

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. Princess natural stones in the index: 2,158 USD per carat, +5.7% 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

367

Lowest Price

HK$2,607 HKD

Highest Price

HK$12,543 HKD

Average Price

HK$5,405 HKD