How much does a 3.00 to 4.99ct F I1 natural round diamond cost?

As of September 2026, 3.00 to 4.99ct F I1 natural round diamonds typically cost £8,312 GBP to £35,194 GBP, with a median price of £17,325 GBP. There are currently 96 diamonds matching this specification available across retailers.

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

About 48% of these diamonds are available at multiple retailers, with an average price spread of 89%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F I1 Natural Round

Quick answer

As of September 2026, there are 96 natural round diamonds with F colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £8,312 GBP to £35,194 GBP, with a median of £17,325 GBP. At least 23 retailers stock this exact specification, and 48% of the stones appear at more than one of them, with an average price spread of 89%. Half of all listings fall between £3,207 GBP and £8,343 GBP per carat. The same specification in lab grown form lists at a median of about £3,921 GBP per carat. Over the last 30 days the median price moved -11.4% and the number of listings moved +1.1%.

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

Lowest Price

£4,296 GBP

Highest Price

£81,931 GBP

Average Price

£19,951 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

48.5%

Price Spread

88.5%

30-Day Price Trend

-11.4%

30-Day Supply Change

+1.1%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$7,838/ct

10th Percentile

$3,222

Median

$7,838

90th Percentile

$13,865

Score Distribution

96 diamonds scored across 4 quality tiers

Excellent

10 (10.4%)

Very Good

35 (36.5%)

Good

21 (21.9%)

Average

30 (31.3%)

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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