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

As of October 2026, 5.00ct+ F SI2 lab grown heart diamonds typically cost £475 GBP to £11,642 GBP, with a median price of £1,671 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?

About 100% of these diamonds are available at multiple retailers, with an average price spread of 70%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ F SI2 Lab Grown Heart

Quick answer

As of October 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 £475 GBP to £11,642 GBP, with a median of £1,671 GBP. At least 7 retailers stock this exact specification, and 100% of the stones appear at more than one of them, with an average price spread of 70%. Half of all listings fall between £159 GBP and £309 GBP per carat. Over the last 30 days the median price moved -17.5% and the number of listings moved +42.5%.

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 lab grown stones in the index: 421 USD per carat, -1.8% 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

£475 GBP

Highest Price

£17,108 GBP

Average Price

£4,547 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

100.0%

Price Spread

69.6%

30-Day Price Trend

-17.5%

30-Day Supply Change

+42.5%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$288/ct

10th Percentile

$210

Median

$288

90th Percentile

$412

Score Distribution

7 diamonds scored across 4 quality tiers

Excellent

2 (28.6%)

Very Good

3 (42.9%)

Good

1 (14.3%)

Average

1 (14.3%)

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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