How much does a 1.50 to 1.99ct I SI1 natural emerald diamond cost?

As of October 2026, 1.50 to 1.99ct I SI1 natural emerald diamonds typically cost $3,315 USD to $10,252 USD, with a median price of $5,752 USD. There are currently 156 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 61%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I SI1 Natural Emerald

Quick answer

As of October 2026, there are 156 natural emerald diamonds with I color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,315 USD to $10,252 USD, with a median of $5,752 USD. At least 61 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 61%. Half of all listings fall between $3,083 USD and $5,692 USD per carat. The same specification in lab grown form lists at a median of about $730 USD per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +10.2%.

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

156

Lowest Price

$2,883 USD

Highest Price

$16,793 USD

Average Price

$6,364 USD