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

As of November 2026, 1.00 to 1.49ct I SI1 natural asscher diamonds typically cost €1,203 EUR to €3,517 EUR, with a median price of €1,992 EUR. There are currently 93 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 59%. 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 November 2026, there are 93 natural asscher diamonds with I colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,203 EUR to €3,517 EUR, with a median of €1,992 EUR. 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 59%. Half of all listings fall between €1,540 EUR and €2,729 EUR per carat. The same specification in lab grown form lists at a median of about €948 EUR per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +6.8%.

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: November 2026

Available

Lowest Price

€845 EUR

Highest Price

€7,151 EUR

Average Price

€2,142 EUR