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

As of October 2026, 1.00 to 1.49ct I SI1 natural asscher diamonds typically cost $1,369 USD to $3,921 USD, with a median price of $2,204 USD. There are currently 95 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I SI1 Natural Asscher

Quick answer

As of October 2026, there are 95 natural asscher diamonds with I color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,369 USD to $3,921 USD, with a median of $2,204 USD. At least 58 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between $1,715 USD and $2,996 USD per carat. The same specification in lab grown form lists at a median of about $1,059 USD per carat. Over the last 30 days the median price moved -1.2% and the number of listings moved +5.1%.

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

$965 USD

Highest Price

$6,699 USD

Average Price

$2,379 USD