How much does a 1.00 to 1.49ct E SI1 natural heart diamond cost?

As of November 2026, 1.00 to 1.49ct E SI1 natural heart diamonds typically cost €1,478 EUR to €4,569 EUR, with a median price of €2,037 EUR. There are currently 234 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct E SI1 Natural Heart

Quick answer

As of November 2026, there are 234 natural heart diamonds with E colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,478 EUR to €4,569 EUR, with a median of €2,037 EUR. At least 63 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between €1,820 EUR and €3,028 EUR per carat. The same specification in lab grown form lists at a median of about €319 EUR per carat. Over the last 30 days the median price moved -1.5% and the number of listings moved +6.1%.

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

234

Lowest Price

€1,028 EUR

Highest Price

€12,175 EUR

Average Price

€2,632 EUR