It's worthless Enamel color technology uses high temperature to burn enamel color, and the surface of the silver jewelry outside the 925 or 999 sterling silver necklace is burned with color, which looks beautiful, but its essence still belongs to silver material, and there is not much room for appreciation and preservation. Enamel is a composite handicraft that is obtained by applying ground enamel glaze to the surface of metal products made by metal processing technology, and then drying, firing and other manufacturing steps.