However, 24 carat gold will be the best investment option because it is 99.9% pure gold. Although 24 carat gold is not durable and is easily scratched, it has a higher inherent value than 22 carat gold (only 91.67% gold). Most of the “gold jewelry” sold today is 14 carats, meaning that only about 58 percent is gold. To get the most gold for your money, look for 22K or 24K.
However, there is an advantage of 24-carat gold. If you want to invest in gold, or if you want a family heirloom that will maintain its value for many generations, 24k may be the ideal option. While it's the highest carat gold possible and while gold is a beautiful substance, it has a lot of disadvantages. Therefore, while those with the highest quality in carats are the most requested, you can also buy gold jewelry with less gold.
As you can see in the examples above by James Allen, 14 and 18 carat gold is commonly used in both white and yellow gold. Therefore, “24 carat gold” jewelry indicates the purity index, while “24 carat gold” jewelry simply indicates its weight (which does not take into account impurities).