How much does a 0.75 to 0.99ct I VS1 natural oval diamond cost?

As of October 2026, 0.75 to 0.99ct I VS1 natural oval diamonds typically cost £837 GBP to £2,330 GBP, with a median price of £1,360 GBP. There are currently 366 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct I VS1 Natural Oval

Quick answer

As of October 2026, there are 366 natural oval diamonds with I colour and VS1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £837 GBP to £2,330 GBP, with a median of £1,360 GBP. At least 63 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between £1,437 GBP and £2,404 GBP per carat. The same specification in lab grown form lists at a median of about £738 GBP per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved -4.5%.

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. Oval natural stones in the index: 2,655 USD per carat, +10.2% 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

366

Lowest Price

£512 GBP

Highest Price

£4,428 GBP

Average Price

£1,491 GBP