How much does a 1.00 to 1.49ct F SI2 natural marquise diamond cost?

As of September 2026, 1.00 to 1.49ct F SI2 natural marquise diamonds typically cost £1,255 GBP to £3,818 GBP, with a median price of £2,193 GBP. There are currently 1,456 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI2 marquise diamond?

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1.00 to 1.49ct F SI2 Natural Marquise

Quick answer

As of September 2026, there are 1,456 natural marquise diamonds with F colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,255 GBP to £3,818 GBP, with a median of £2,193 GBP. At least 50 retailers stock this exact specification. Half of all listings fall between £1,697 GBP and £2,679 GBP per carat. The same specification in lab grown form lists at a median of about £1,604 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 natural stones in the index: 2,114 USD per carat, -8.8% 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

1,456

Lowest Price

£649 GBP

Highest Price

£14,418 GBP

Average Price

£2,382 GBP

Market Intelligence

Retailers Selling

Price Spread

45.5%

Price Range

Price per carat distribution across retailers

$2,911/ct

10th Percentile

$1,761

Median

$2,911

90th Percentile

$4,392

Score Distribution

1.5K diamonds scored across 4 quality tiers

Excellent

218 (15.0%)

Very Good

389 (26.7%)

Good

537 (36.9%)

Average

312 (21.4%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown F SI2Same specifications, lab-grown origin

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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