What is the highest carat gold you can buy?

Gold is measured in karats whereas gems are measured in carats.

The higher the karat the more pure the gold is. You can buy whatever karat you it just depends on your location, eastern countries and Indian sell 20k to 24k gold whereas in the US the most popular is 14k you can tho find 16k and 18k.

Pure gold is 24K, but as you go to higher K gold, you also get softer material, which is easily damaged through normal usage.