How much does a 5.00ct+ J SI1 natural oval diamond cost?

As of September 2026, 5.00ct+ J SI1 natural oval diamonds typically cost HK$316,373 HKD to HK$987,820 HKD, with a median price of HK$599,245 HKD. There are currently 143 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ J SI1 Natural Oval

Quick answer

As of September 2026, there are 143 natural oval diamonds with J colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$316,373 HKD to HK$987,820 HKD, with a median of HK$599,245 HKD. At least 9 retailers stock this exact specification. Half of all listings fall between HK$91,657 HKD and HK$152,315 HKD per carat. The same specification in lab grown form lists at a median of about HK$138,983 HKD per carat.

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. Oval natural stones in the index: 2,380 USD per carat, -9.6% 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

143

Lowest Price

HK$218,283 HKD

Highest Price

HK$4,570,862 HKD

Average Price

HK$700,561 HKD

Market Intelligence

Retailers Selling

Price Spread

59.4%

Price Range

Price per carat distribution across retailers

$13,284/ct

10th Percentile

$8,199

Median

$13,284

90th Percentile

$30,600

Score Distribution

143 diamonds scored across 4 quality tiers

Excellent

8 (5.6%)

Very Good

27 (18.9%)

Good

46 (32.2%)

Average

62 (43.4%)

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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