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

As of September 2026, 5.00ct+ D IF lab grown marquise diamonds typically cost £20,352 GBP to £33,134 GBP, with a median price of £26,057 GBP. There are currently 24 diamonds matching this specification available across retailers.

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

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5.00ct+ D IF Lab Grown Marquise

Quick answer

As of September 2026, there are 24 lab grown marquise diamonds with D colour and IF clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £20,352 GBP to £33,134 GBP, with a median of £26,057 GBP. At least 24 retailers stock this exact specification. Half of all listings fall between £2,699 GBP and £6,153 GBP per carat. The same specification in natural form lists at a median of about £37,750 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. Marquise lab grown stones in the index: 500 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

Lowest Price

£1,546 GBP

Highest Price

£118,087 GBP

Average Price

£27,944 GBP

Market Intelligence

Retailers Selling

Price Spread

71.3%

Price Range

Price per carat distribution across retailers

$6,151/ct

10th Percentile

$1,869

Median

$6,151

90th Percentile

$11,696

Score Distribution

24 diamonds scored across 4 quality tiers

Excellent

6 (25.0%)

Very Good

5 (20.8%)

Good

11 (45.8%)

Average

2 (8.3%)

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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