How much does a 3.00 to 4.99ct D FL lab grown heart diamond cost?

As of October 2026, 3.00 to 4.99ct D FL lab grown heart diamonds typically cost £1,769 GBP to £12,502 GBP, with a median price of £4,296 GBP. There are currently 158 diamonds matching this specification available across retailers.

Where can I find the best price on a D FL heart diamond?

About 49% of these diamonds are available at multiple retailers, with an average price spread of 140%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D FL Lab Grown Heart

Quick answer

As of October 2026, there are 158 lab grown heart diamonds with D colour and FL clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £1,769 GBP to £12,502 GBP, with a median of £4,296 GBP. At least 33 retailers stock this exact specification, and 49% of the stones appear at more than one of them, with an average price spread of 140%. Half of all listings fall between £715 GBP and £2,083 GBP per carat. Over the last 30 days the median price moved -18.9% and the number of listings moved +26.9%.

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

158

Lowest Price

£1,497 GBP

Highest Price

£35,320 GBP

Average Price

£5,912 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

49.2%

Price Spread

140.2%

30-Day Price Trend

-18.9%

30-Day Supply Change

+26.9%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$1,299/ct

10th Percentile

$818

Median

$1,299

90th Percentile

$4,683

Score Distribution

451 diamonds scored across 5 quality tiers

Exceptional

14 (3.1%)

Excellent

190 (42.1%)

Very Good

33 (7.3%)

Good

163 (36.1%)

Average

51 (11.3%)

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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