How much does a 1.00 to 1.49ct I SI1 natural emerald diamond cost?

As of September 2026, 1.00 to 1.49ct I SI1 natural emerald diamonds typically cost £1,096 GBP to £3,120 GBP, with a median price of £1,593 GBP. There are currently 774 diamonds matching this specification available across retailers.

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

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

1.00 to 1.49ct I SI1 Natural Emerald

Quick answer

As of September 2026, there are 774 natural emerald diamonds with I colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,096 GBP to £3,120 GBP, with a median of £1,593 GBP. At least 57 retailers stock this exact specification. Half of all listings fall between £1,361 GBP and £1,986 GBP per carat. The same specification in lab grown form lists at a median of about £479 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

774

Lowest Price

£702 GBP

Highest Price

£7,236 GBP

Average Price

£1,841 GBP