How much does a 5.00ct+ J I1 natural round diamond cost?

As of September 2026, 5.00ct+ J I1 natural round diamonds typically cost HK$152,359 HKD to HK$685,177 HKD, with a median price of HK$349,173 HKD. There are currently 26 diamonds matching this specification available across retailers.

Where can I find the best price on a J I1 round diamond?

About 51% of these diamonds are available at multiple retailers, with an average price spread of 22%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ J I1 Natural Round

Quick answer

As of September 2026, there are 26 natural round diamonds with J colour and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$152,359 HKD to HK$685,177 HKD, with a median of HK$349,173 HKD. At least 8 retailers stock this exact specification, and 51% of the stones appear at more than one of them, with an average price spread of 22%. Half of all listings fall between HK$35,534 HKD and HK$44,257 HKD per carat. The same specification in lab grown form lists at a median of about HK$51,721 HKD per carat. Over the last 30 days the median price moved -32.6% and the number of listings moved -86.5%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round natural stones in the index: 2,094 USD per carat, -3.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

HK$122,983 HKD

Highest Price

HK$1,262,366 HKD

Average Price

HK$407,165 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

51.3%

Price Spread

21.8%

30-Day Price Trend

-32.6%

30-Day Supply Change

-86.5%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$5,098/ct

10th Percentile

$3,112

Median

$5,098

90th Percentile

$5,913

Score Distribution

26 diamonds scored across 3 quality tiers

Very Good

5 (19.2%)

Good

7 (26.9%)

Average

14 (53.8%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1