How much does a 3.00 to 4.99ct I SI1 natural emerald diamond cost?

As of September 2026, 3.00 to 4.99ct I SI1 natural emerald diamonds typically cost £13,625 GBP to £51,853 GBP, with a median price of £24,965 GBP. There are currently 202 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct I SI1 Natural Emerald

Quick answer

As of September 2026, there are 202 natural emerald diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £13,625 GBP to £51,853 GBP, with a median of £24,965 GBP. At least 49 retailers stock this exact specification. Half of all listings fall between £7,072 GBP and £10,110 GBP per carat. The same specification in lab grown form lists at a median of about £793 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. Emerald natural stones in the index: 2,166 USD per carat, -6.6% 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

202

Lowest Price

£7,765 GBP

Highest Price

£101,849 GBP

Average Price

£28,956 GBP