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

As of September 2026, 3.00 to 4.99ct J SI1 natural heart diamonds typically cost £14,394 GBP to £49,252 GBP, with a median price of £23,403 GBP. There are currently 40 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct J SI1 Natural Heart

Quick answer

As of September 2026, there are 40 natural heart diamonds with J colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £14,394 GBP to £49,252 GBP, with a median of £23,403 GBP. At least 18 retailers stock this exact specification. Half of all listings fall between £3,673 GBP and £5,109 GBP per carat. The same specification in lab grown form lists at a median of about £1,733 GBP 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

£11,458 GBP

Highest Price

£77,278 GBP

Average Price

£28,635 GBP

Market Intelligence

Retailers Selling

Price Spread

33.3%

Price Range

Price per carat distribution across retailers

$5,806/ct

10th Percentile

$3,189

Median

$5,806

90th Percentile

$7,800

Score Distribution

40 diamonds scored across 3 quality tiers

Very Good

7 (17.5%)

Good

10 (25.0%)

Average

23 (57.5%)

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Consider Instead

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

J SI2SI2 inclusions are not visible without magnification

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Lab-Grown J 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