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

As of October 2026, 3.00 to 4.99ct I SI1 natural emerald diamonds typically cost £16,928 GBP to £56,915 GBP, with a median price of £31,801 GBP. There are currently 88 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 34%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI1 Natural Emerald

Quick answer

As of October 2026, there are 88 natural emerald diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £16,928 GBP to £56,915 GBP, with a median of £31,801 GBP. At least 53 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 34%. Half of all listings fall between £7,057 GBP and £9,897 GBP per carat. The same specification in lab grown form lists at a median of about £351 GBP per carat. Over the last 30 days the median price moved -2.1% and the number of listings moved +12.2%.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Emerald natural stones in the index: 2,278 USD per carat, +6.2% month on month. See the full index release

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

Last updated: October 2026

Available

Lowest Price

£9,360 GBP

Highest Price

£103,208 GBP

Average Price

£34,815 GBP