How much does a 0.75 to 0.99ct F I1 natural round diamond cost?

As of October 2026, 0.75 to 0.99ct F I1 natural round diamonds typically cost £634 GBP to £2,111 GBP, with a median price of £1,086 GBP. There are currently 230 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 68%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct F I1 Natural Round

Quick answer

As of October 2026, there are 230 natural round diamonds with F colour and I1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £634 GBP to £2,111 GBP, with a median of £1,086 GBP. At least 30 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 68%. Half of all listings fall between £895 GBP and £1,682 GBP per carat. Over the last 30 days the median price moved -3.7% and the number of listings moved +8.1%.

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

230

Lowest Price

£265 GBP

Highest Price

£3,551 GBP

Average Price

£1,238 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

33.1%

Price Spread

68.3%

30-Day Price Trend

-3.7%

30-Day Supply Change

+8.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,534/ct

10th Percentile

$930

Median

$1,534

90th Percentile

$3,212

Score Distribution

641 diamonds scored across 4 quality tiers

Excellent

81 (12.6%)

Very Good

143 (22.3%)

Good

116 (18.1%)

Average

301 (47.0%)

Find Your Diamond

Search 230 F I1 round diamonds and compare prices.

Search Diamonds

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