How much does a 1.00 to 1.49ct F I1 natural round diamond cost?

As of October 2026, 1.00 to 1.49ct F I1 natural round diamonds typically cost £1,027 GBP to £3,603 GBP, with a median price of £1,977 GBP. There are currently 575 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 65%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct F I1 Natural Round

Quick answer

As of October 2026, there are 575 natural round diamonds with F colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,027 GBP to £3,603 GBP, with a median of £1,977 GBP. At least 31 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 65%. Half of all listings fall between £1,220 GBP and £2,272 GBP per carat. The same specification in lab grown form lists at a median of about £675 GBP per carat. Over the last 30 days the median price moved -5.6% and the number of listings moved +10.5%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

575

Lowest Price

£429 GBP

Highest Price

£7,064 GBP

Average Price

£2,181 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

34.2%

Price Spread

64.8%

30-Day Price Trend

-5.6%

30-Day Supply Change

+10.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,163/ct

10th Percentile

$1,253

Median

$2,163

90th Percentile

$4,197

Score Distribution

1.7K diamonds scored across 4 quality tiers

Excellent

201 (11.9%)

Very Good

375 (22.1%)

Good

280 (16.5%)

Average

839 (49.5%)

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Consider Instead

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

Lab-Grown F I1Same specifications, lab-grown origin

Save 39%

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