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

As of October 2026, 5.00ct+ D FL lab grown radiant diamonds typically cost £6,802 GBP to £30,480 GBP, with a median price of £16,273 GBP. There are currently 139 diamonds matching this specification available across retailers.

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

About 46% of these diamonds are available at multiple retailers, with an average price spread of 92%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ D FL Lab Grown Radiant

Quick answer

As of October 2026, there are 139 lab grown radiant diamonds with D colour and FL clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £6,802 GBP to £30,480 GBP, with a median of £16,273 GBP. At least 31 retailers stock this exact specification, and 46% of the stones appear at more than one of them, with an average price spread of 92%. Half of all listings fall between £1,692 GBP and £4,156 GBP per carat. Over the last 30 days the median price moved -11.1% and the number of listings moved +22.1%.

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

139

Lowest Price

£3,893 GBP

Highest Price

£68,506 GBP

Average Price

£17,636 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

45.7%

Price Spread

91.9%

30-Day Price Trend

-11.1%

30-Day Supply Change

+22.1%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$3,561/ct

10th Percentile

$1,889

Median

$3,561

90th Percentile

$7,255

Score Distribution

415 diamonds scored across 5 quality tiers

Exceptional

22 (5.3%)

Excellent

127 (30.6%)

Very Good

54 (13.0%)

Good

178 (42.9%)

Average

34 (8.2%)

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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