How much does a 1.00 to 1.49ct G SI1 natural round diamond cost?

As of November 2026, 1.00 to 1.49ct G SI1 natural round diamonds typically cost €2,041 EUR to €5,872 EUR, with a median price of €3,233 EUR. There are currently 3,803 diamonds matching this specification available across retailers.

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

About 35% 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.

1.00 to 1.49ct G SI1 Natural Round

Quick answer

As of November 2026, there are 3,803 natural round diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €2,041 EUR to €5,872 EUR, with a median of €3,233 EUR. At least 68 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between €2,480 EUR and €4,019 EUR per carat. The same specification in lab grown form lists at a median of about €369 EUR per carat. Over the last 30 days the median price moved +0.0% and the number of listings moved +7.7%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

3,803

Lowest Price

€902 EUR

Highest Price

€12,054 EUR

Average Price

€3,697 EUR