How much does a 1.50 to 1.99ct I VS1 natural heart diamond cost?

As of October 2026, 1.50 to 1.99ct I VS1 natural heart diamonds typically cost $6,495 AUD to $19,367 AUD, with a median price of $9,964 AUD. There are currently 120 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 heart diamond?

About 31% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I VS1 Natural Heart

Quick answer

As of October 2026, there are 120 natural heart diamonds with I colour and VS1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $6,495 AUD to $19,367 AUD, with a median of $9,964 AUD. At least 60 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between $5,428 AUD and $8,568 AUD per carat. The same specification in lab grown form lists at a median of about $621 AUD per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +8.8%.

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

120

Lowest Price

$4,271 AUD

Highest Price

$30,849 AUD

Average Price

$11,738 AUD