How much does a 1.50 to 1.99ct F IF lab grown marquise diamond cost?

As of October 2026, 1.50 to 1.99ct F IF lab grown marquise diamonds typically cost £448 GBP to £3,825 GBP, with a median price of £1,700 GBP. There are currently 18 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 94%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct F IF Lab Grown Marquise

Quick answer

As of October 2026, there are 18 lab grown marquise diamonds with F colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £448 GBP to £3,825 GBP, with a median of £1,700 GBP. At least 41 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 94%. Half of all listings fall between £392 GBP and £1,145 GBP per carat. The same specification in natural form lists at a median of about £9,691 GBP per carat. Over the last 30 days the median price moved -15.9% and the number of listings moved +16.3%.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise lab grown stones in the index: 485 USD per carat, -3.2% 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: October 2026

Available

Lowest Price

£311 GBP

Highest Price

£5,506 GBP

Average Price

£1,909 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

27.7%

Price Spread

93.9%

30-Day Price Trend

-15.9%

30-Day Supply Change

+16.3%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$1,065/ct

10th Percentile

$370

Median

$1,065

90th Percentile

$2,220

Score Distribution

66 diamonds scored across 4 quality tiers

Excellent

14 (21.2%)

Very Good

7 (10.6%)

Good

20 (30.3%)

Average

25 (37.9%)

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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