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

As of September 2026, 1.00 to 1.49ct G SI1 natural heart diamonds typically cost €1,338 EUR to €4,180 EUR, with a median price of €1,968 EUR. There are currently 1,003 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct G SI1 Natural Heart

Quick answer

As of September 2026, there are 1,003 natural heart diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,338 EUR to €4,180 EUR, with a median of €1,968 EUR. At least 61 retailers stock this exact specification. Half of all listings fall between €1,651 EUR and €2,510 EUR per carat. The same specification in lab grown form lists at a median of about €653 EUR per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Heart natural stones in the index: 2,261 USD per carat, +1.7% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

1,003

Lowest Price

€429 EUR

Highest Price

€8,649 EUR

Average Price

€2,400 EUR