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

As of October 2026, 3.00 to 4.99ct D FL lab grown radiant diamonds typically cost £1,772 GBP to £10,563 GBP, with a median price of £3,626 GBP. There are currently 1,170 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 90%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D FL Lab Grown Radiant

Quick answer

As of October 2026, there are 1,170 lab grown radiant diamonds with D colour and FL clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £1,772 GBP to £10,563 GBP, with a median of £3,626 GBP. At least 40 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 90%. Half of all listings fall between £764 GBP and £1,743 GBP per carat. Over the last 30 days the median price moved -21.8% and the number of listings moved +21.1%.

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. Radiant lab grown stones in the index: 474 USD per carat, -2.1% 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

1,170

Lowest Price

£1,225 GBP

Highest Price

£33,210 GBP

Average Price

£5,267 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

47.2%

Price Spread

90.0%

30-Day Price Trend

-21.8%

30-Day Supply Change

+21.1%

Volatility (30d)

0.07

Price Range

Price per carat distribution across retailers

$1,449/ct

10th Percentile

$781

Median

$1,449

90th Percentile

$4,020

Score Distribution

3.5K diamonds scored across 5 quality tiers

Exceptional

26 (0.8%)

Excellent

1,375 (39.7%)

Very Good

241 (7.0%)

Good

1,371 (39.6%)

Average

450 (13.0%)

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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