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

As of September 2026, 5.00ct+ D IF lab grown cushion diamonds typically cost £5,471 GBP to £24,534 GBP, with a median price of £10,907 GBP. There are currently 691 diamonds matching this specification available across retailers.

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

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5.00ct+ D IF Lab Grown Cushion

Quick answer

As of September 2026, there are 691 lab grown cushion diamonds with D colour and IF clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £5,471 GBP to £24,534 GBP, with a median of £10,907 GBP. At least 11 retailers stock this exact specification. Half of all listings fall between £7,402 GBP and £10,564 GBP per carat. The same specification in natural form lists at a median of about £30,060 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

691

Lowest Price

£2,812 GBP

Highest Price

£357,618 GBP

Average Price

£15,494 GBP

Market Intelligence

Retailers Selling

Price Spread

42.1%

Price Range

Price per carat distribution across retailers

$10,137/ct

10th Percentile

$9,016

Median

$10,137

90th Percentile

$16,753

Score Distribution

691 diamonds scored across 4 quality tiers

Excellent

171 (24.7%)

Very Good

247 (35.7%)

Good

212 (30.7%)

Average

61 (8.8%)

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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