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

As of October 2026, 3.00 to 4.99ct F SI1 natural heart diamonds typically cost £21,761 GBP to £67,740 GBP, with a median price of £38,245 GBP. There are currently 19 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 43%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F SI1 Natural Heart

Quick answer

As of October 2026, there are 19 natural heart diamonds with F colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £21,761 GBP to £67,740 GBP, with a median of £38,245 GBP. At least 47 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 43%. Half of all listings fall between £6,848 GBP and £10,316 GBP per carat. The same specification in lab grown form lists at a median of about £278 GBP per carat. Over the last 30 days the median price moved -5.5% and the number of listings moved +14.6%.

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

£12,940 GBP

Highest Price

£128,384 GBP

Average Price

£41,270 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

30.6%

Price Spread

43.1%

30-Day Price Trend

-5.5%

30-Day Supply Change

+14.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$10,769/ct

10th Percentile

$8,296

Median

$10,769

90th Percentile

$16,065

Score Distribution

84 diamonds scored across 4 quality tiers

Excellent

4 (4.8%)

Very Good

12 (14.3%)

Good

12 (14.3%)

Average

56 (66.7%)

Find Your Diamond

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Consider Instead

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

F SI2SI2 inclusions are not visible without magnification

Save 31%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 96%

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