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

As of October 2026, 1.50 to 1.99ct I SI1 natural asscher diamonds typically cost $3,271 USD to $8,269 USD, with a median price of $5,416 USD. There are currently 67 diamonds matching this specification available across retailers.

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

About 27% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I SI1 Natural Asscher

Quick answer

As of October 2026, there are 67 natural asscher diamonds with I color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,271 USD to $8,269 USD, with a median of $5,416 USD. At least 54 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between $3,000 USD and $4,894 USD per carat. The same specification in lab grown form lists at a median of about $906 USD per carat. Over the last 30 days the median price moved -0.7% and the number of listings moved +12.5%.

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. Asscher natural stones in the index: 2,504 USD per carat, -3.3% 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

$2,278 USD

Highest Price

$15,524 USD

Average Price

$5,778 USD