How much does a 0.50 to 0.74ct I VS1 natural round diamond cost?

As of October 2026, 0.50 to 0.74ct I VS1 natural round diamonds typically cost £403 GBP to £1,258 GBP, with a median price of £696 GBP. There are currently 6,263 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 56%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I VS1 Natural Round

Quick answer

As of October 2026, there are 6,263 natural round diamonds with I colour and VS1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £403 GBP to £1,258 GBP, with a median of £696 GBP. At least 70 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 56%. Half of all listings fall between £1,037 GBP and £1,759 GBP per carat. The same specification in lab grown form lists at a median of about £778 GBP per carat. Over the last 30 days the median price moved -2.4% and the number of listings moved +9.9%.

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

6,263

Lowest Price

£205 GBP

Highest Price

£2,727 GBP

Average Price

£779 GBP