How much does a 3.00 to 4.99ct I SI2 natural heart diamond cost?

As of October 2026, 3.00 to 4.99ct I SI2 natural heart diamonds typically cost HK$94,020 HKD to HK$680,564 HKD, with a median price of HK$247,555 HKD. There are currently 79 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 48%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI2 Natural Heart

Quick answer

As of October 2026, there are 79 natural heart diamonds with I colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$94,020 HKD to HK$680,564 HKD, with a median of HK$247,555 HKD. At least 43 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 48%. Half of all listings fall between HK$34,906 HKD and HK$56,802 HKD per carat. Over the last 30 days the median price moved -1.6% and the number of listings moved +13.9%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Heart natural stones in the index: 2,374 USD per carat, +9.8% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

HK$63,780 HKD

Highest Price

HK$1,382,083 HKD

Average Price

HK$324,954 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

37.7%

Price Spread

47.5%

30-Day Price Trend

-1.6%

30-Day Supply Change

+13.9%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,869/ct

10th Percentile

$3,531

Median

$5,869

90th Percentile

$9,331

Score Distribution

219 diamonds scored across 4 quality tiers

Excellent

33 (15.1%)

Very Good

49 (22.4%)

Good

30 (13.7%)

Average

107 (48.9%)

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Consider Instead

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

J SI2J colour is visually identical to I to the naked eye

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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