How much does a 2.00 to 2.99ct I SI1 natural cushion diamond cost?

As of September 2026, 2.00 to 2.99ct I SI1 natural cushion diamonds typically cost $12,338 NZD to $36,961 NZD, with a median price of $21,581 NZD. There are currently 754 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

2.00 to 2.99ct I SI1 Natural Cushion

Quick answer

As of September 2026, there are 754 natural cushion diamonds with I colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $12,338 NZD to $36,961 NZD, with a median of $21,581 NZD. At least 49 retailers stock this exact specification. Half of all listings fall between $7,996 NZD and $12,696 NZD per carat. The same specification in lab grown form lists at a median of about $2,739 NZD per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

754

Lowest Price

$6,531 NZD

Highest Price

$81,944 NZD

Average Price

$23,286 NZD