Gold used in jewelry varies from 9 karat, through 14, 18, and 22 karat, to 24 karat which is pure gold.
Hi emilia,
Yes, Gold is generally valued according to its weight or karats. A 14 karat gold jewelry is made with approximately 58.5% of gold which is then mixed with nickel and copper. It probably is the most famous and common karat, which is purchased.
Gold pieces, which are 18 karat, are made of 75% pure gold. A lot of premium jewelry have 18 karats and are just a bit more expensive compared to 14-karat jewelry pieces.
22 to 24 karat pieces, are considered as the most valuable and are the most popular among buyers. They are the purest form, as they are made up of 99% gold.