How much does a 5.00ct+ D FL lab grown radiant diamond cost?

As of September 2026, 5.00ct+ D FL lab grown radiant diamonds typically cost £8,291 GBP to £37,913 GBP, with a median price of £22,457 GBP. There are currently 501 diamonds matching this specification available across retailers.

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

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5.00ct+ D FL Lab Grown Radiant

Quick answer

As of September 2026, there are 501 lab grown radiant diamonds with D colour and FL clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £8,291 GBP to £37,913 GBP, with a median of £22,457 GBP. At least 23 retailers stock this exact specification. Half of all listings fall between £2,098 GBP and £5,780 GBP per carat. The same specification in natural form lists at a median of about £43,091 GBP per carat.

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

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. Radiant lab grown stones in the index: 473 USD per carat, -12.5% 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

501

Lowest Price

£6,702 GBP

Highest Price

£303,943 GBP

Average Price

£25,224 GBP

Market Intelligence

Retailers Selling

Price Spread

109.3%

Price Range

Price per carat distribution across retailers

$4,278/ct

10th Percentile

$2,202

Median

$4,278

90th Percentile

$9,056

Score Distribution

501 diamonds scored across 4 quality tiers

Excellent

124 (24.8%)

Very Good

128 (25.5%)

Good

200 (39.9%)

Average

49 (9.8%)

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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