How much does a 5.00ct+ G FL natural round diamond cost?

As of September 2026, 5.00ct+ G FL natural round diamonds typically cost £136,080 GBP to £221,818 GBP, with a median price of £171,318 GBP. There are currently 6 diamonds matching this specification available across retailers.

Where can I find the best price on a G FL round diamond?

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5.00ct+ G FL Natural Round

Quick answer

As of September 2026, there are 6 natural round diamonds with G colour and FL clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £136,080 GBP to £221,818 GBP, with a median of £171,318 GBP. At least 25 retailers stock this exact specification. Half of all listings fall between £28,790 GBP and £41,050 GBP per carat. The same specification in lab grown form lists at a median of about £4,320 GBP per carat.

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

6.20ct Round G FL, GIA, score 89 of 100, from £125,307 GBP

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

Lowest Price

£125,307 GBP

Highest Price

£229,500 GBP

Average Price

£176,405 GBP

Market Intelligence

Retailers Selling

Price Spread

34.5%

Price Range

Price per carat distribution across retailers

$47,939/ct

10th Percentile

$32,197

Median

$47,939

90th Percentile

$63,022

Score Distribution

6 diamonds scored across 3 quality tiers

Excellent

1 (16.7%)

Very Good

2 (33.3%)

Good

3 (50.0%)

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Consider Instead

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

Lab-Grown G FLSame specifications, lab-grown origin

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