How much does a 3.00 to 4.99ct I SI1 natural heart diamond cost?

As of November 2026, 3.00 to 4.99ct I SI1 natural heart diamonds typically cost €17,951 EUR to €85,227 EUR, with a median price of €34,721 EUR. There are currently 47 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI1 heart diamond?

About 29% of these diamonds are available at multiple retailers, with an average price spread of 21%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI1 Natural Heart

Quick answer

As of November 2026, there are 47 natural heart diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €17,951 EUR to €85,227 EUR, with a median of €34,721 EUR. At least 32 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 21%. Half of all listings fall between €5,637 EUR and €6,903 EUR per carat. The same specification in lab grown form lists at a median of about €845 EUR per carat. Over the last 30 days the median price moved -3.2% and the number of listings moved +8.2%.

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

€11,441 EUR

Highest Price

€165,977 EUR

Average Price

€46,238 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

29.5%

Price Spread

20.9%

30-Day Price Trend

-3.2%

30-Day Supply Change

+8.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$6,755/ct

10th Percentile

$5,431

Median

$6,755

90th Percentile

$8,546

Score Distribution

160 diamonds scored across 4 quality tiers

Excellent

13 (8.1%)

Very Good

29 (18.1%)

Good

20 (12.5%)

Average

98 (61.3%)

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Consider Instead

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

I SI2SI2 inclusions are not visible without magnification

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Lab-Grown I SI1Same 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