How much does a 1.00 to 1.49ct I IF natural round diamond cost?

As of October 2026, 1.00 to 1.49ct I IF natural round diamonds typically cost $3,928 AUD to $11,336 AUD, with a median price of $6,163 AUD. There are currently 477 diamonds matching this specification available across retailers.

Where can I find the best price on a I IF round diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I IF Natural Round

Quick answer

As of October 2026, there are 477 natural round diamonds with I colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $3,928 AUD to $11,336 AUD, with a median of $6,163 AUD. At least 64 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $4,831 AUD and $7,469 AUD per carat. The same specification in lab grown form lists at a median of about $688 AUD per carat. Over the last 30 days the median price moved +0.5% and the number of listings moved +0.6%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

477

Lowest Price

$2,627 AUD

Highest Price

$25,001 AUD

Average Price

$6,923 AUD