How much does a 3.00 to 4.99ct F FL lab grown round diamond cost?

As of October 2026, 3.00 to 4.99ct F FL lab grown round diamonds typically cost £1,056 GBP to £5,791 GBP, with a median price of £2,089 GBP. There are currently 19 diamonds matching this specification available across retailers.

Where can I find the best price on a F FL round diamond?

About 40% of these diamonds are available at multiple retailers, with an average price spread of 108%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F FL Lab Grown Round

Quick answer

As of October 2026, there are 19 lab grown round diamonds with F colour and FL clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £1,056 GBP to £5,791 GBP, with a median of £2,089 GBP. At least 35 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 108%. Half of all listings fall between £506 GBP and £1,277 GBP per carat. The same specification in natural form lists at a median of about £19,254 GBP per carat. Over the last 30 days the median price moved -8.5% and the number of listings moved +20.8%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

£824 GBP

Highest Price

£12,169 GBP

Average Price

£2,979 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

40.0%

Price Spread

107.8%

30-Day Price Trend

-8.5%

30-Day Supply Change

+20.8%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$951/ct

10th Percentile

$512

Median

$951

90th Percentile

$2,447

Score Distribution

45 diamonds scored across 4 quality tiers

Excellent

14 (31.1%)

Very Good

4 (8.9%)

Good

14 (31.1%)

Average

13 (28.9%)

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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