How much does a 5.00ct+ I SI2 natural heart diamond cost?

As of September 2026, 5.00ct+ I SI2 natural heart diamonds typically cost HK$235,462 HKD to HK$1,116,150 HKD, with a median price of HK$513,209 HKD. There are currently 27 diamonds matching this specification available across retailers.

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

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

5.00ct+ I SI2 Natural Heart

Quick answer

As of September 2026, there are 27 natural heart diamonds with I colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$235,462 HKD to HK$1,116,150 HKD, with a median of HK$513,209 HKD. At least 18 retailers stock this exact specification. Half of all listings fall between HK$55,322 HKD and HK$150,608 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. Heart natural stones in the index: 2,261 USD per carat, +1.7% 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$183,792 HKD

Highest Price

HK$4,616,616 HKD

Average Price

HK$667,384 HKD

Market Intelligence

Retailers Selling

Price Spread

95.0%

Price Range

Price per carat distribution across retailers

$13,034/ct

10th Percentile

$5,932

Median

$13,034

90th Percentile

$28,261

Score Distribution

27 diamonds scored across 4 quality tiers

Excellent

3 (11.1%)

Very Good

8 (29.6%)

Good

6 (22.2%)

Average

10 (37.0%)

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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