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

As of September 2026, 2.00 to 2.99ct G SI1 natural round diamonds typically cost £9,612 GBP to £23,987 GBP, with a median price of £14,291 GBP. There are currently 1,642 diamonds matching this specification available across retailers.

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

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2.00 to 2.99ct G SI1 Natural Round

Quick answer

As of September 2026, there are 1,642 natural round diamonds with G colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £9,612 GBP to £23,987 GBP, with a median of £14,291 GBP. At least 62 retailers stock this exact specification. Half of all listings fall between £6,271 GBP and £8,595 GBP per carat. The same specification in lab grown form lists at a median of about £270 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

1,642

Lowest Price

£5,371 GBP

Highest Price

£72,577 GBP

Average Price

£15,803 GBP