How much does a 1.00 to 1.49ct G SI1 natural round diamond cost?

As of November 2026, 1.00 to 1.49ct G SI1 natural round diamonds typically cost $4,047 NZD to $11,647 NZD, with a median price of $6,467 NZD. There are currently 3,796 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 round diamond?

About 35% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI1 Natural Round

Quick answer

As of November 2026, there are 3,796 natural round diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $4,047 NZD to $11,647 NZD, with a median of $6,467 NZD. At least 68 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between $4,916 NZD and $7,967 NZD per carat. The same specification in lab grown form lists at a median of about $732 NZD per carat. Over the last 30 days the median price moved +0.0% and the number of listings moved +7.7%.

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: November 2026

Available

3,796

Lowest Price

$1,788 NZD

Highest Price

$23,895 NZD

Average Price

$7,349 NZD