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

As of September 2026, 3.00 to 4.99ct J SI2 natural marquise diamonds typically cost HK$93,480 HKD to HK$388,270 HKD, with a median price of HK$200,342 HKD. There are currently 93 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct J SI2 Natural Marquise

Quick answer

As of September 2026, there are 93 natural marquise diamonds with J colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$93,480 HKD to HK$388,270 HKD, with a median of HK$200,342 HKD. At least 31 retailers stock this exact specification. Half of all listings fall between HK$38,994 HKD and HK$71,513 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. Marquise natural stones in the index: 2,114 USD per carat, -8.8% 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$61,112 HKD

Highest Price

HK$1,258,636 HKD

Average Price

HK$229,706 HKD

Market Intelligence

Retailers Selling

Price Spread

63.7%

Price Range

Price per carat distribution across retailers

$6,505/ct

10th Percentile

$3,862

Median

$6,505

90th Percentile

$11,386

Score Distribution

93 diamonds scored across 4 quality tiers

Excellent

5 (5.4%)

Very Good

39 (41.9%)

Good

17 (18.3%)

Average

32 (34.4%)

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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