How much does a 1.00 to 1.49ct I SI2 natural princess diamond cost?

As of October 2026, 1.00 to 1.49ct I SI2 natural princess diamonds typically cost HK$10,372 HKD to HK$28,284 HKD, with a median price of HK$17,318 HKD. There are currently 175 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 56%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I SI2 Natural Princess

Quick answer

As of October 2026, there are 175 natural princess diamonds with I colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$10,372 HKD to HK$28,284 HKD, with a median of HK$17,318 HKD. At least 51 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 56%. Half of all listings fall between HK$11,988 HKD and HK$20,795 HKD per carat. The same specification in lab grown form lists at a median of about HK$8,044 HKD per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +9.4%.

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

175

Lowest Price

HK$6,389 HKD

Highest Price

HK$70,107 HKD

Average Price

HK$18,601 HKD