The term  refers to jewelry welding, a core process in jewelry manufacturing, repair, and restoration. It involves heating metals (or solder) to their melting point to join jewelry components—such as gemstone setting prongs, chain links, and joints of the jewelry main body. To ensure the weld is strong, aesthetically pleasing, and does not damage the jewelry itself (especially gemstones), appropriate welding techniques must be selected based on the jewelry’s material, structure, and technical requirements.