Gold-filled jewelry comprises a base metal, typically brass or copper, mechanically bonded with a layer of gold. This layer of gold must be at least 5% of the item’s total weight. For example, a gold-filled chain might consist of a brass core covered with a thick sheet of 14k gold, creating a durable and aesthetically pleasing piece.
The primary advantage lies in its affordability compared to solid gold. It offers a significant cost reduction while retaining the appearance and some of the properties of karat gold. Historically, this manufacturing process provided a more accessible option for individuals seeking the luxurious look of gold without the high price point.