What is Gold-Filled? Gold-filled is a United States layered gold product that is gaining popularity throughout the Americas, Asia and Europe. It is a quality material that is common in all types of jewelry. The product is easy to care for and will usually maintain its golden shine for a lifetime. Gold-filled is constructed in two or three layers. The core metal is jewelers’ brass. A gold alloy is then bonded to one or both surfaces of the brass core with heat and pressure. Unlike plated (aka electroplated or "dipped") metals, Gold-filled is legally required to contain 5% or 1/20 gold by weight. This 5% is then described by the karatage of the gold alloy. Our Gold-filled items are 14kt gold-filled.