How much does a 5.00ct+ J SI2 natural oval diamond cost?

As of September 2026, 5.00ct+ J SI2 natural oval diamonds typically cost HK$352,405 HKD to HK$1,238,813 HKD, with a median price of HK$517,462 HKD. There are currently 184 diamonds matching this specification available across retailers.

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

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

5.00ct+ J SI2 Natural Oval

Quick answer

As of September 2026, there are 184 natural oval diamonds with J colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$352,405 HKD to HK$1,238,813 HKD, with a median of HK$517,462 HKD. At least 13 retailers stock this exact specification. Half of all listings fall between HK$128,249 HKD and HK$170,253 HKD per carat. The same specification in lab grown form lists at a median of about HK$82,577 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

184

Lowest Price

HK$209,895 HKD

Highest Price

HK$2,108,215 HKD

Average Price

HK$661,974 HKD

Market Intelligence

Retailers Selling

Price Spread

28.5%

Price Range

Price per carat distribution across retailers

$18,792/ct

10th Percentile

$13,379

Median

$18,792

90th Percentile

$24,823

Score Distribution

184 diamonds scored across 4 quality tiers

Excellent

11 (6.0%)

Very Good

47 (25.5%)

Good

61 (33.2%)

Average

65 (35.3%)

Find Your Diamond

Search 184 J SI2 oval diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

J I1I1 inclusions are not visible without magnification

Save 17%

Lab-Grown J SI2Same specifications, lab-grown origin

Save 44%

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