How much does a 0.50 to 0.74ct E SI1 natural cushion diamond cost?

As of October 2026, 0.50 to 0.74ct E SI1 natural cushion diamonds typically cost HK$3,709 HKD to HK$13,944 HKD, with a median price of HK$6,090 HKD. There are currently 284 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 73%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E SI1 Natural Cushion

Quick answer

As of October 2026, there are 284 natural cushion diamonds with E colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run HK$3,709 HKD to HK$13,944 HKD, with a median of HK$6,090 HKD. At least 54 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 73%. Half of all listings fall between HK$8,410 HKD and HK$15,981 HKD per carat. The same specification in lab grown form lists at a median of about HK$4,318 HKD per carat. Over the last 30 days the median price moved -3.0% and the number of listings moved +4.9%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

284

Lowest Price

HK$2,785 HKD

Highest Price

HK$27,837 HKD

Average Price

HK$7,549 HKD