How much does a 3.00 to 4.99ct I SI1 natural heart diamond cost?

As of October 2026, 3.00 to 4.99ct I SI1 natural heart diamonds typically cost $27,906 CAD to $132,865 CAD, with a median price of $54,186 CAD. There are currently 48 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 24%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI1 Natural Heart

Quick answer

As of October 2026, there are 48 natural heart diamonds with I color and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $27,906 CAD to $132,865 CAD, with a median of $54,186 CAD. At least 43 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 24%. Half of all listings fall between $9,223 CAD and $11,650 CAD per carat. The same specification in lab grown form lists at a median of about $1,268 CAD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +9.6%.

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

Lowest Price

$17,921 CAD

Highest Price

$259,027 CAD

Average Price

$71,883 CAD