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

As of October 2026, 0.75 to 0.99ct I VS1 natural heart diamonds typically cost £741 GBP to £1,837 GBP, with a median price of £1,112 GBP. There are currently 166 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct I VS1 Natural Heart

Quick answer

As of October 2026, there are 166 natural heart diamonds with I colour and VS1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £741 GBP to £1,837 GBP, with a median of £1,112 GBP. At least 59 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between £1,190 GBP and £1,927 GBP per carat. The same specification in lab grown form lists at a median of about £448 GBP per carat. Over the last 30 days the median price moved -2.5% and the number of listings moved +3.5%.

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. Heart natural stones in the index: 2,374 USD per carat, +9.8% 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

166

Lowest Price

£442 GBP

Highest Price

£3,641 GBP

Average Price

£1,215 GBP