An item of jewelry comprising a base metal, such as brass or copper, that has a layer of 10 karat gold mechanically bonded to its surface is a common type of adornment. The gold layer, while not solid gold, must constitute at least 5% of the item’s total weight. As an illustration, consider a band crafted from jeweler’s brass that is then covered with a layer of 10k gold; this exemplifies a gold-filled item.
This construction method offers a cost-effective alternative to solid gold pieces, providing a similar aesthetic at a lower price point. Historically, this manufacturing technique emerged as a way to create more accessible gold jewelry. The resulting item benefits from the durability of the base metal and the appearance of a higher-karat gold exterior. This balance between cost and perceived value contributes to its widespread use.