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

As of September 2026, 1.00 to 1.49ct G SI1 natural cushion diamonds typically cost $1,432 USD to $4,528 USD, with a median price of $2,496 USD. There are currently 1,305 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct G SI1 Natural Cushion

Quick answer

As of September 2026, there are 1,305 natural cushion diamonds with G color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,432 USD to $4,528 USD, with a median of $2,496 USD. At least 54 retailers stock this exact specification. Half of all listings fall between $1,941 USD and $3,408 USD per carat. The same specification in lab grown form lists at a median of about $440 USD 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

1,305

Lowest Price

$983 USD

Highest Price

$13,030 USD

Average Price

$2,795 USD