Yellow gold is a popular metal used in jewelry and decorative items. It is an alloy made primarily of pure gold mixed with other metals, such as copper and silver, to enhance its strength and durability. The warm, rich color of yellow gold makes it a favorite choice for engagement rings, necklaces, and bracelets. The purity of yellow gold is measured in karats, with 24 karat being pure gold. Lower karat values, like 18K or 14K, contain a higher proportion of other metals, which can affect the color and durability. Yellow gold is also resistant to tarnish, making it a long-lasting option for jewelry.