Gold-filled jewelry wire and findings are made by a process of physically combining a thin alloy of gold on top of a gold-tone base metal. The base metal adds strength and is fabricated so that it is on the inside of the wire or sheet metal. The gold alloy on the outside provides the color, corrosion resistance and permanence of real gold. The combination of the gold alloy on the outside and the gold tone metal on the inside where it can not be seen allows jewelry designers to make gold-filled jewelry at a fraction of the cost of solid gold, but with the look and feel of 14K gold. Most gold-filled jewelry wire is made of 5% gold alloy and the remainder is a gold tone metal. With gold-filled jewelry wire or findings the coating of gold alloy on the outside of the wire or sheet of metal is millions of molecules of gold thick. By contrast gold-plated jewelry wire or findings may have a coating of gold only 2 to 4 molecules of gold thick.
View a variety of gold-plated, and gold-filled jewelry wire here.