The term refers to a composite material commonly used in jewelry and other decorative items. It begins with a base of 92.5% pure silver, alloyed with other metals, usually copper, to enhance its durability. This silver base is then coated with a thin layer of gold, specifically gold that is alloyed to 18 karats, indicating that it is 75% pure gold. This combination offers the aesthetic appeal of gold with the structural integrity and affordability of silver.
This layering process provides several advantages. The silver core offers strength and resilience, making it suitable for crafting intricate designs. The gold layer provides a luxurious appearance, mimicking the look of solid gold at a significantly lower cost. Historically, such techniques have allowed for broader access to precious metal aesthetics, democratizing luxury and allowing for more versatile designs than would be feasible with solid gold alone.