22k gold is a type of gold alloy that contains 91.67% pure gold by weight and 8.33% other metals, such as silver, copper, or zinc. The term "k" refers to the karat measurement system used to indicate the purity of gold, with 24 karat (24k) being the purest form of gold.

22k gold is commonly used in jewelry making because it is relatively durable and has a rich, yellow color that is highly sought after. It is also considered to be a good balance between purity and hardness, making it ideal for intricate designs and settings. However, because 22k gold is not completely pure, it is more susceptible to tarnishing and may require more frequent cleaning and maintenance than higher-purity gold alloys.