How much does a 1.50 to 1.99ct I VS1 natural radiant diamond cost?

As of October 2026, 1.50 to 1.99ct I VS1 natural radiant diamonds typically cost £4,022 GBP to £11,431 GBP, with a median price of £6,273 GBP. There are currently 114 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I VS1 Natural Radiant

Quick answer

As of October 2026, there are 114 natural radiant diamonds with I colour and VS1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £4,022 GBP to £11,431 GBP, with a median of £6,273 GBP. At least 64 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between £3,622 GBP and £5,435 GBP per carat. The same specification in lab grown form lists at a median of about £350 GBP per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved +16.9%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

114

Lowest Price

£2,373 GBP

Highest Price

£16,408 GBP

Average Price

£7,013 GBP