These rustic enamel jewelry set have been made using copper. After applying and painting enamel colours on metal, they have been fired in a kiln at 760-800 degrees Celsius which make them fuse to metal. There are various methods and techniques of enameling. I have over fired these that made the blue-green colour of copper oxides come to surface and make this pattern.
Each side of earrings measures 2.7 cm and the length of pendant is 3.7 cm