How much does a 1.00 to 1.49ct D FL lab grown marquise diamond cost?

As of September 2026, 1.00 to 1.49ct D FL lab grown marquise diamonds typically cost £221 GBP to £2,423 GBP, with a median price of £649 GBP. There are currently 4,945 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct D FL Lab Grown Marquise

Quick answer

As of September 2026, there are 4,945 lab grown marquise diamonds with D colour and FL clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £221 GBP to £2,423 GBP, with a median of £649 GBP. At least 29 retailers stock this exact specification. Half of all listings fall between £488 GBP and £1,276 GBP per carat. The same specification in natural form lists at a median of about £7,338 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

4,945

Lowest Price

£160 GBP

Highest Price

£31,791 GBP

Average Price

£1,088 GBP

Market Intelligence

Retailers Selling

Price Spread

119.0%

Price Range

Price per carat distribution across retailers

$893/ct

10th Percentile

$463

Median

$893

90th Percentile

$2,759

Score Distribution

4.9K diamonds scored across 4 quality tiers

Excellent

1,228 (24.8%)

Very Good

1,284 (26.0%)

Good

1,072 (21.7%)

Average

1,361 (27.5%)

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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