How much does a 0.20 to 0.49ct G SI1 natural heart diamond cost?

As of November 2026, 0.20 to 0.49ct G SI1 natural heart diamonds typically cost $607 NZD to $1,064 NZD, with a median price of $866 NZD. There are currently 354 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 25%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct G SI1 Natural Heart

Quick answer

As of November 2026, there are 354 natural heart diamonds with G colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $607 NZD to $1,064 NZD, with a median of $866 NZD. At least 16 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 25%. Half of all listings fall between $2,314 NZD and $2,956 NZD per carat. The same specification in lab grown form lists at a median of about $807 NZD per carat. Over the last 30 days the median price moved -5.1% and the number of listings moved -11.1%.

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

354

Lowest Price

$297 NZD

Highest Price

$2,131 NZD

Average Price

$865 NZD