How much does a 1.00 to 1.49ct I VS1 natural cushion diamond cost?

As of October 2026, 1.00 to 1.49ct I VS1 natural cushion diamonds typically cost $2,028 AUD to $6,286 AUD, with a median price of $3,455 AUD. There are currently 693 diamonds matching this specification available across retailers.

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

About 32% 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 I VS1 Natural Cushion

Quick answer

As of October 2026, there are 693 natural cushion diamonds with I colour and VS1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,028 AUD to $6,286 AUD, with a median of $3,455 AUD. At least 59 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 59%. Half of all listings fall between $2,793 AUD and $5,003 AUD per carat. The same specification in lab grown form lists at a median of about $778 AUD per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +11.5%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

693

Lowest Price

$1,458 AUD

Highest Price

$14,786 AUD

Average Price

$3,927 AUD