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

As of October 2026, 3.00 to 4.99ct I VS1 natural round diamonds typically cost £21,682 GBP to £69,351 GBP, with a median price of £37,249 GBP. There are currently 337 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I VS1 Natural Round

Quick answer

As of October 2026, there are 337 natural round diamonds with I colour and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £21,682 GBP to £69,351 GBP, with a median of £37,249 GBP. At least 64 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between £8,583 GBP and £12,757 GBP per carat. The same specification in lab grown form lists at a median of about £284 GBP per carat. Over the last 30 days the median price moved -0.3% and the number of listings moved +5.3%.

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

337

Lowest Price

£12,083 GBP

Highest Price

£125,368 GBP

Average Price

£42,419 GBP