White gold is a popular metal alloy made primarily of gold mixed with other metals, such as palladium, nickel, or silver. This combination gives white gold its distinctive silvery appearance while maintaining the desirable properties of gold, such as durability and resistance to tarnish. The purity of white gold is often measured in karats, with 14K and 18K being the most common options. To enhance its shine and protect it from scratches, white gold jewelry is often plated with a thin layer of rhodium, a precious metal that adds a bright, reflective finish. This plating may wear off over time, requiring reapplication to maintain the jewelry's appearance.