The term describes a specific method of constructing jewelry and other items. It denotes a base metal, often brass, that has a layer of gold bonded to its surface. The gold layer must constitute at least 5% of the item’s total weight and be 14 karats in purity. For example, a necklace described using this terminology comprises a non-precious metal core with a substantial outer layer of 14kt gold permanently bonded to it through heat and pressure.
This construction method offers a more affordable alternative to solid gold items while still providing the appearance and some of the durability of higher-karat gold. Its significance lies in its ability to deliver a product with a substantial layer of gold, offering tarnish resistance and a longer lifespan than gold-plated items. Historically, this process has been a popular choice for producing jewelry and watch cases, balancing cost and value.