Goldfilled

Gold-filled is a type of jewelry material in which a substantial layer of gold is mechanically bonded to a base metal, typically brass or copper. The outer gold layer is an alloy, usually 10 to 14 karat, and must constitute at least 1/20 of the total weight of the piece. The bond is created by applying heat and pressure to fuse the gold layer to the base metal, resulting in a durable composite that is far more resistant to wear than standard gold plating.

Standards and markings vary by jurisdiction, but in the United States gold-filled products are defined by FTC guidelines and industry practice. The gold layer must account for at least 5% of the weight, and the gold itself is typically 10K or higher. Common markings include 1/20 10K GF, 1/20 14K GF, or simply GF, indicating gold-filled.

Durability and care: Because the gold layer is thicker than typical plating, gold-filled jewelry resists flaking and fading better and can last many years with normal wear. However, heavy abrasion, harsh chemicals, or prolonged exposure to moisture can wear through the layer, exposing the base metal.

Comparison and uses: Gold-filled is more expensive than gold-plated items but far cheaper than solid gold jewelry. It is widely used for necklaces, bracelets, clasps, earrings, and findings. It can be polished and repaired, though significant damage may require professional work.

Care guidance: Clean with mild soap and water; avoid abrasive cleaners. Remove jewelry during swimming or bathing to minimize exposure to chemicals.