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

As of September 2026, 2.00 to 2.99ct G SI1 natural cushion diamonds typically cost £7,553 GBP to £20,717 GBP, with a median price of £12,618 GBP. There are currently 717 diamonds matching this specification available across retailers.

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

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

2.00 to 2.99ct G SI1 Natural Cushion

Quick answer

As of September 2026, there are 717 natural cushion diamonds with G colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £7,553 GBP to £20,717 GBP, with a median of £12,618 GBP. At least 51 retailers stock this exact specification. Half of all listings fall between £4,668 GBP and £7,231 GBP per carat. The same specification in lab grown form lists at a median of about £349 GBP 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

717

Lowest Price

£4,139 GBP

Highest Price

£45,780 GBP

Average Price

£13,595 GBP