How much does a 1.50 to 1.99ct E IF natural radiant diamond cost?

As of October 2026, 1.50 to 1.99ct E IF natural radiant diamonds typically cost $18,546 AUD to $33,991 AUD, with a median price of $25,352 AUD. There are currently 4 diamonds matching this specification available across retailers.

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

About 24% of these diamonds are available at multiple retailers, with an average price spread of 29%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E IF Natural Radiant

Quick answer

As of October 2026, there are 4 natural radiant diamonds with E colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $18,546 AUD to $33,991 AUD, with a median of $25,352 AUD. At least 27 retailers stock this exact specification, and 24% of the stones appear at more than one of them, with an average price spread of 29%. Half of all listings fall between $12,665 AUD and $17,113 AUD per carat. The same specification in lab grown form lists at a median of about $859 AUD per carat. Over the last 30 days the median price moved +3.2% and the number of listings moved -19.6%.

Three of the best scored stones at this specification right now:

1.51ct Radiant E IF, GIA, grade A, from $16,510 AUD

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

Lowest Price

$16,510 AUD

Highest Price

$35,991 AUD

Average Price

$25,963 AUD