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

As of November 6, 2026, 1.00 to 1.49ct G SI1 natural cushion diamonds typically cost $2,637 NZD to $8,316 NZD, with a median price of $4,687 NZD. There are currently 1,287 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 62%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI1 Natural Cushion

Quick answer

As of November 6, 2026, there are 1,287 natural cushion diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,637 NZD to $8,316 NZD, with a median of $4,687 NZD. Half of all listings fall between $3,140 NZD and $5,849 NZD per carat. The same specification in lab grown form lists at a median of about $867 NZD per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved +4.1%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Cushion natural stones in the index: 2,881 USD per carat, -2.5% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

1,287

Lowest Price

$1,890 NZD

Highest Price

$17,092 NZD

Average Price

$5,206 NZD