According to jewelry experts, the average carat size largely depends on age and location. The average size for the US couple is one carat, while most European couples stay around 0.5-0.6 carat.

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What is the stamp for diamonds on a ring? It depends on whether or not the diamond is natural or lab-created. If it's a real diamond, you can expect to see a stamp with carats and points. If it's made of synthetic gemstones like Cubic Zirconia, you may see a CZ mark.

1.00 Carat Because it's the most popular weight, diamonds experience a price jump at 1.00 ct. The price jump is especially high for round diamonds, and, at this weight, you'll get the most savings by choosing a fancy shape.