How much does a 0.75 to 0.99ct E SI1 natural round diamond cost?

As of October 2026, 0.75 to 0.99ct E SI1 natural round diamonds typically cost HK$11,025 HKD to HK$35,381 HKD, with a median price of HK$18,987 HKD. There are currently 1,696 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 62%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct E SI1 Natural Round

Quick answer

As of October 2026, there are 1,696 natural round diamonds with E colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run HK$11,025 HKD to HK$35,381 HKD, with a median of HK$18,987 HKD. At least 68 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 62%. Half of all listings fall between HK$16,852 HKD and HK$29,953 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,319 HKD per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved +8.2%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

1,696

Lowest Price

HK$6,326 HKD

Highest Price

HK$60,839 HKD

Average Price

HK$21,433 HKD