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

As of September 2026, 3.00 to 4.99ct F SI2 natural cushion diamonds typically cost HK$166,882 HKD to HK$460,835 HKD, with a median price of HK$256,545 HKD. There are currently 103 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct F SI2 Natural Cushion

Quick answer

As of September 2026, there are 103 natural cushion diamonds with F colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$166,882 HKD to HK$460,835 HKD, with a median of HK$256,545 HKD. At least 44 retailers stock this exact specification. Half of all listings fall between HK$67,032 HKD and HK$100,197 HKD per carat. The same specification in lab grown form lists at a median of about HK$4,649 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

103

Lowest Price

HK$144,371 HKD

Highest Price

HK$1,018,754 HKD

Average Price

HK$298,156 HKD

Market Intelligence

Retailers Selling

Price Spread

39.2%

Price Range

Price per carat distribution across retailers

$10,788/ct

10th Percentile

$6,841

Median

$10,788

90th Percentile

$14,482

Score Distribution

103 diamonds scored across 4 quality tiers

Excellent

27 (26.2%)

Very Good

34 (33.0%)

Good

24 (23.3%)

Average

18 (17.5%)

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Consider Instead

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F I1I1 inclusions are not visible without magnification

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Lab-Grown F 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