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

As of September 2026, 3.00 to 4.99ct J SI2 natural cushion diamonds typically cost HK$127,946 HKD to HK$384,995 HKD, with a median price of HK$205,291 HKD. There are currently 197 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct J SI2 Natural Cushion

Quick answer

As of September 2026, there are 197 natural cushion diamonds with J colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$127,946 HKD to HK$384,995 HKD, with a median of HK$205,291 HKD. At least 38 retailers stock this exact specification. Half of all listings fall between HK$40,108 HKD and HK$65,795 HKD per carat. The same specification in lab grown form lists at a median of about HK$43,069 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. Cushion natural stones in the index: 2,792 USD per carat, +1.1% 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

197

Lowest Price

HK$83,438 HKD

Highest Price

HK$977,888 HKD

Average Price

HK$238,553 HKD

Market Intelligence

Retailers Selling

Price Spread

47.0%

Price Range

Price per carat distribution across retailers

$6,967/ct

10th Percentile

$4,106

Median

$6,967

90th Percentile

$9,646

Score Distribution

197 diamonds scored across 4 quality tiers

Excellent

18 (9.1%)

Very Good

44 (22.3%)

Good

62 (31.5%)

Average

73 (37.1%)

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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

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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