How much does a 5.00ct+ F SI2 lab grown heart diamond cost?

As of September 2026, 5.00ct+ F SI2 lab grown heart diamonds typically cost £778 GBP to £7,231 GBP, with a median price of £779 GBP. There are currently 3 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI2 heart diamond?

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

5.00ct+ F SI2 Lab Grown Heart

Quick answer

As of September 2026, there are 3 lab grown heart diamonds with F colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £778 GBP to £7,231 GBP, with a median of £779 GBP. At least 7 retailers stock this exact specification. Half of all listings fall between £215 GBP and £804 GBP per carat. The same specification in natural form lists at a median of about £10,031 GBP per carat.

Three of the best scored stones at this specification right now:

20.06ct Heart F SI2, IGI, score 71 of 100, from £8,844 GBP

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 lab grown stones in the index: 440 USD per carat, -9.4% 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

£777 GBP

Highest Price

£16,866 GBP

Average Price

£3,467 GBP

Market Intelligence

Retailers Selling

Price Spread

210.7%

Price Range

Price per carat distribution across retailers

$378/ct

10th Percentile

$252

Median

$378

90th Percentile

$1,687

Score Distribution

3 diamonds scored across 2 quality tiers

Very Good

1 (33.3%)

Average

2 (66.7%)

Find Your Diamond

Search 3 F SI2 heart diamonds and compare prices.

Search Diamonds

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