How much does a 0.50 to 0.74ct F I1 lab grown marquise diamond cost?

As of November 2026, 0.50 to 0.74ct F I1 lab grown marquise diamonds typically cost €735 EUR to €786 EUR, with a median price of €755 EUR. There are currently 3 diamonds matching this specification available across retailers.

Where can I find the best price on a F I1 marquise diamond?

About 60% of these diamonds are available at multiple retailers, with an average price spread of 12%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F I1 Lab Grown Marquise

Quick answer

As of November 2026, there are 3 lab grown marquise diamonds with F colour and I1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €735 EUR to €786 EUR, with a median of €755 EUR. At least 8 retailers stock this exact specification, and 60% of the stones appear at more than one of them, with an average price spread of 12%. Half of all listings fall between €996 EUR and €1,130 EUR per carat. The same specification in natural form lists at a median of about €1,351 EUR per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise lab grown stones in the index: 505 USD per carat, +1.6% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: November 2026

Available

Lowest Price

€730 EUR

Highest Price

€794 EUR

Average Price

€760 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

60.0%

Price Spread

12.4%

Price Range

Price per carat distribution across retailers

$1,210/ct

10th Percentile

$346

Median

$1,210

90th Percentile

$1,374

Score Distribution

3 diamonds scored across 1 quality tiers

Good

3 (100.0%)

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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