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

As of September 2026, 3.00 to 4.99ct D IF lab grown cushion diamonds typically cost £1,596 GBP to £9,501 GBP, with a median price of £3,977 GBP. There are currently 5,150 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct D IF Lab Grown Cushion

Quick answer

As of September 2026, there are 5,150 lab grown cushion diamonds with D colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £1,596 GBP to £9,501 GBP, with a median of £3,977 GBP. At least 41 retailers stock this exact specification. Half of all listings fall between £687 GBP and £2,104 GBP per carat. The same specification in natural form lists at a median of about £29,752 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

5,150

Lowest Price

£768 GBP

Highest Price

£94,684 GBP

Average Price

£5,241 GBP

Market Intelligence

Retailers Selling

Price Spread

138.1%

Price Range

Price per carat distribution across retailers

$1,387/ct

10th Percentile

$705

Median

$1,387

90th Percentile

$3,474

Score Distribution

5.2K diamonds scored across 5 quality tiers

Exceptional

29 (0.6%)

Excellent

1,258 (24.4%)

Very Good

1,743 (33.8%)

Good

1,376 (26.7%)

Average

744 (14.4%)

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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