How much does a 3.00 to 4.99ct G I1 natural heart diamond cost?

As of October 2026, 3.00 to 4.99ct G I1 natural heart diamonds typically cost £17,120 GBP to £64,771 GBP, with a median price of £28,781 GBP. There are currently 2 diamonds matching this specification available across retailers.

Where can I find the best price on a G I1 heart diamond?

About 3% of these diamonds are available at multiple retailers, with an average price spread of 13%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G I1 Natural Heart

Quick answer

As of October 2026, there are 2 natural heart diamonds with G colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £17,120 GBP to £64,771 GBP, with a median of £28,781 GBP. At least 10 retailers stock this exact specification, and 3% of the stones appear at more than one of them, with an average price spread of 13%. Half of all listings fall between £2,970 GBP and £3,399 GBP per carat. Over the last 30 days the median price moved -5.0% and the number of listings moved +8.1%.

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

£3,360 GBP

Highest Price

£115,866 GBP

Average Price

£39,673 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

2.5%

Price Spread

13.3%

30-Day Price Trend

-5.0%

30-Day Supply Change

+8.1%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$4,317/ct

10th Percentile

$3,299

Median

$4,317

90th Percentile

$5,396

Score Distribution

29 diamonds scored across 3 quality tiers

Excellent

2 (6.9%)

Very Good

1 (3.4%)

Average

26 (89.7%)

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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