How much does a 3.00 to 4.99ct I VS1 natural round diamond cost?

As of September 2026, 3.00 to 4.99ct I VS1 natural round diamonds typically cost £16,457 GBP to £54,865 GBP, with a median price of £30,574 GBP. There are currently 850 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 round diamond?

Compare prices across retailers on Carat Hunter to see all your options.

3.00 to 4.99ct I VS1 Natural Round

Quick answer

As of September 2026, there are 850 natural round diamonds with I colour and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £16,457 GBP to £54,865 GBP, with a median of £30,574 GBP. At least 59 retailers stock this exact specification. Half of all listings fall between £8,136 GBP and £12,353 GBP per carat. The same specification in lab grown form lists at a median of about £322 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

850

Lowest Price

£11,413 GBP

Highest Price

£123,593 GBP

Average Price

£33,862 GBP