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

As of October 2026, 5.00ct+ D FL lab grown cushion diamonds typically cost £5,021 GBP to £26,277 GBP, with a median price of £12,758 GBP. There are currently 311 diamonds matching this specification available across retailers.

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

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5.00ct+ D FL Lab Grown Cushion

Quick answer

As of October 2026, there are 311 lab grown cushion diamonds with D colour and FL clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £5,021 GBP to £26,277 GBP, with a median of £12,758 GBP. The same specification in natural form lists at a median of about £29,486 GBP per carat.

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. Cushion lab grown stones in the index: 516 USD per carat, +6.9% 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

311

Lowest Price

£4,635 GBP

Highest Price

£66,442 GBP

Average Price

£14,738 GBP

Score Distribution

819 diamonds scored across 5 quality tiers

Exceptional

38 (4.6%)

Excellent

250 (30.5%)

Very Good

87 (10.6%)

Good

391 (47.7%)

Average

53 (6.5%)

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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