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

As of September 2026, 3.00 to 4.99ct G SI1 natural heart diamonds typically cost £16,816 GBP to £65,739 GBP, with a median price of £28,416 GBP. There are currently 58 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

3.00 to 4.99ct G SI1 Natural Heart

Quick answer

As of September 2026, there are 58 natural heart diamonds with G colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £16,816 GBP to £65,739 GBP, with a median of £28,416 GBP. At least 32 retailers stock this exact specification. Half of all listings fall between £6,545 GBP and £8,645 GBP per carat. The same specification in lab grown form lists at a median of about £300 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

£14,087 GBP

Highest Price

£146,008 GBP

Average Price

£35,567 GBP