How much does a 5.00ct+ F SI2 natural round diamond cost?

As of September 2026, 5.00ct+ F SI2 natural round diamonds typically cost £37,608 GBP to £142,029 GBP, with a median price of £73,583 GBP. There are currently 124 diamonds matching this specification available across retailers.

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

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5.00ct+ F SI2 Natural Round

Quick answer

As of September 2026, there are 124 natural round diamonds with F colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £37,608 GBP to £142,029 GBP, with a median of £73,583 GBP. At least 8 retailers stock this exact specification. Half of all listings fall between £13,885 GBP and £17,418 GBP per carat. The same specification in lab grown form lists at a median of about £214 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

124

Lowest Price

£19,852 GBP

Highest Price

£852,789 GBP

Average Price

£90,747 GBP

Market Intelligence

Retailers Selling

Price Spread

22.2%

Price Range

Price per carat distribution across retailers

$21,524/ct

10th Percentile

$16,917

Median

$21,524

90th Percentile

$24,149

Score Distribution

124 diamonds scored across 4 quality tiers

Excellent

31 (25.0%)

Very Good

34 (27.4%)

Good

27 (21.8%)

Average

32 (25.8%)

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Consider Instead

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

F I1I1 inclusions are not visible without magnification

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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