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

As of November 2026, 3.00 to 4.99ct I SI2 natural heart diamonds typically cost $21,263 NZD to $153,909 NZD, with a median price of $56,621 NZD. 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 39% of these diamonds are available at multiple retailers, with an average price spread of 32%. 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 November 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 $21,263 NZD to $153,909 NZD, with a median of $56,621 NZD. At least 24 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 32%. Half of all listings fall between $5,922 NZD and $8,071 NZD per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved +7.8%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Heart natural stones in the index: 2,289 USD per carat, -3.7% 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: November 2026

Available

Lowest Price

$14,371 NZD

Highest Price

$312,557 NZD

Average Price

$73,715 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

38.6%

Price Spread

31.9%

30-Day Price Trend

-1.4%

30-Day Supply Change

+7.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,797/ct

10th Percentile

$3,171

Median

$3,797

90th Percentile

$4,974

Score Distribution

219 diamonds scored across 4 quality tiers

Excellent

34 (15.5%)

Very Good

45 (20.5%)

Good

32 (14.6%)

Average

108 (49.3%)

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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