How much does a 2.00 to 2.99ct I SI1 natural heart diamond cost?

As of November 2026, 2.00 to 2.99ct I SI1 natural heart diamonds typically cost £5,844 GBP to £23,537 GBP, with a median price of £9,783 GBP. There are currently 93 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI1 heart diamond?

About 39% 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.

2.00 to 2.99ct I SI1 Natural Heart

Quick answer

As of November 2026, there are 93 natural heart diamonds with I colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £5,844 GBP to £23,537 GBP, with a median of £9,783 GBP. At least 58 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between £3,312 GBP and £4,924 GBP per carat. The same specification in lab grown form lists at a median of about £1,123 GBP per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +11.8%.

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: November 2026

Available

Lowest Price

£3,335 GBP

Highest Price

£36,309 GBP

Average Price

£12,456 GBP