How much does a 1.50 to 1.99ct G SI2 natural round diamond cost?

As of October 2026, 1.50 to 1.99ct G SI2 natural round diamonds typically cost €2,852 EUR to €10,073 EUR, with a median price of €5,214 EUR. There are currently 2,031 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI2 round diamond?

About 44% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI2 Natural Round

Quick answer

As of October 2026, there are 2,031 natural round diamonds with G colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €2,852 EUR to €10,073 EUR, with a median of €5,214 EUR. At least 62 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 57%. Half of all listings fall between €2,681 EUR and €4,761 EUR per carat. The same specification in lab grown form lists at a median of about €390 EUR per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +11.9%.

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: October 2026

Available

2,031

Lowest Price

€1,464 EUR

Highest Price

€22,290 EUR

Average Price

€5,869 EUR