How much does a 3.00 to 4.99ct J SI2 natural radiant diamond cost?

As of September 2026, 3.00 to 4.99ct J SI2 natural radiant diamonds typically cost HK$126,017 HKD to HK$342,577 HKD, with a median price of HK$185,918 HKD. There are currently 123 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct J SI2 Natural Radiant

Quick answer

As of September 2026, there are 123 natural radiant diamonds with J colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$126,017 HKD to HK$342,577 HKD, with a median of HK$185,918 HKD. At least 6 retailers stock this exact specification. Half of all listings fall between HK$28,560 HKD and HK$60,608 HKD per carat. The same specification in lab grown form lists at a median of about HK$27,044 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. Radiant natural stones in the index: 2,765 USD per carat, +6.0% 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

123

Lowest Price

HK$69,323 HKD

Highest Price

HK$455,150 HKD

Average Price

HK$206,567 HKD

Market Intelligence

Retailers Selling

Price Spread

83.7%

Price Range

Price per carat distribution across retailers

$4,880/ct

10th Percentile

$2,897

Median

$4,880

90th Percentile

$7,876

Score Distribution

123 diamonds scored across 4 quality tiers

Excellent

7 (5.7%)

Very Good

50 (40.7%)

Good

17 (13.8%)

Average

49 (39.8%)

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Consider Instead

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

Lab-Grown J SI2Same specifications, lab-grown origin

Save 29%

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