How much does a 3.00 to 4.99ct F IF lab grown cushion diamond cost?

As of September 2026, 3.00 to 4.99ct F IF lab grown cushion diamonds typically cost £1,088 GBP to £7,157 GBP, with a median price of £2,888 GBP. There are currently 108 diamonds matching this specification available across retailers.

Where can I find the best price on a F IF cushion diamond?

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3.00 to 4.99ct F IF Lab Grown Cushion

Quick answer

As of September 2026, there are 108 lab grown cushion diamonds with F colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £1,088 GBP to £7,157 GBP, with a median of £2,888 GBP. At least 31 retailers stock this exact specification. Half of all listings fall between £563 GBP and £1,477 GBP per carat. The same specification in natural form lists at a median of about £12,261 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. Cushion lab grown stones in the index: 466 USD per carat, -14.7% 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

108

Lowest Price

£719 GBP

Highest Price

£16,910 GBP

Average Price

£3,719 GBP

Market Intelligence

Retailers Selling

Price Spread

118.7%

Price Range

Price per carat distribution across retailers

$1,041/ct

10th Percentile

$552

Median

$1,041

90th Percentile

$2,495

Score Distribution

108 diamonds scored across 4 quality tiers

Excellent

31 (28.7%)

Very Good

29 (26.9%)

Good

17 (15.7%)

Average

31 (28.7%)

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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