How much does a 1.00 to 1.49ct I IF natural round diamond cost?

As of September 2026, 1.00 to 1.49ct I IF natural round diamonds typically cost £2,061 GBP to £4,912 GBP, with a median price of £2,991 GBP. There are currently 1,802 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct I IF Natural Round

Quick answer

As of September 2026, there are 1,802 natural round diamonds with I colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £2,061 GBP to £4,912 GBP, with a median of £2,991 GBP. At least 58 retailers stock this exact specification. Half of all listings fall between £2,493 GBP and £3,493 GBP per carat. The same specification in lab grown form lists at a median of about £2,736 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

1,802

Lowest Price

£1,368 GBP

Highest Price

£13,843 GBP

Average Price

£3,253 GBP