How much does a 5.00ct+ G SI2 natural cushion diamond cost?

As of September 2026, 5.00ct+ G SI2 natural cushion diamonds typically cost HK$405,541 HKD to HK$1,138,996 HKD, with a median price of HK$599,081 HKD. There are currently 46 diamonds matching this specification available across retailers.

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

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

5.00ct+ G SI2 Natural Cushion

Quick answer

As of September 2026, there are 46 natural cushion diamonds with G colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$405,541 HKD to HK$1,138,996 HKD, with a median of HK$599,081 HKD. At least 27 retailers stock this exact specification. Half of all listings fall between HK$109,427 HKD and HK$144,001 HKD per carat. The same specification in lab grown form lists at a median of about HK$2,314 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

Lowest Price

HK$187,121 HKD

Highest Price

HK$2,332,542 HKD

Average Price

HK$705,790 HKD

Market Intelligence

Retailers Selling

Price Spread

27.9%

Price Range

Price per carat distribution across retailers

$15,811/ct

10th Percentile

$10,904

Median

$15,811

90th Percentile

$20,120

Score Distribution

46 diamonds scored across 4 quality tiers

Excellent

10 (21.7%)

Very Good

11 (23.9%)

Good

11 (23.9%)

Average

14 (30.4%)

Find Your Diamond

Search 46 G SI2 cushion diamonds and compare prices.

Search Diamonds

Consider Instead

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

Lab-Grown G SI2Same specifications, lab-grown origin

Save 98%

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