 There are a few places that Byzantine craftsmen could have picked up the technique.Enameling is thought to have existed in an early form in ancient Egypt, where examples of gold ornaments containing glass paste separated by strips of gold have been found in tombs.However, there are questions about whether the Egyptians were using actual enameling techniques; it is possible that instead they were casting glass stones which were then enclosed, set into metal frames, and then sanded to a finish, similarly to how precious stones are set.