How much does a 1.50 to 1.99ct G SI2 natural princess diamond cost?

As of October 2026, 1.50 to 1.99ct G SI2 natural princess diamonds typically cost $4,135 AUD to $14,630 AUD, with a median price of $8,132 AUD. There are currently 171 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI2 princess diamond?

About 35% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI2 Natural Princess

Quick answer

As of October 2026, there are 171 natural princess diamonds with G colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $4,135 AUD to $14,630 AUD, with a median of $8,132 AUD. At least 54 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 57%. Half of all listings fall between $3,757 AUD and $6,617 AUD per carat. The same specification in lab grown form lists at a median of about $563 AUD per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +7.4%.

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. Princess natural stones in the index: 2,158 USD per carat, +5.7% 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

171

Lowest Price

$3,209 AUD

Highest Price

$27,662 AUD

Average Price

$8,800 AUD