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

As of November 2026, 1.00 to 1.49ct G SI1 natural heart diamonds typically cost $2,225 AUD to $7,265 AUD, with a median price of $3,386 AUD. There are currently 374 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 59%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI1 Natural Heart

Quick answer

As of November 2026, there are 374 natural heart diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,225 AUD to $7,265 AUD, with a median of $3,386 AUD. At least 65 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 59%. Half of all listings fall between $2,678 AUD and $4,667 AUD per carat. The same specification in lab grown form lists at a median of about $675 AUD per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved +9.2%.

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

374

Lowest Price

$1,324 AUD

Highest Price

$14,136 AUD

Average Price

$4,216 AUD