Cloisonné is an ancient technique for decorating metalwork objects using vitreous enamels.
The decoration is formed by bonding metal thin strips to a metal base to create cells or compartments.
Then vitreous enamels are put into the cells which are often of several colors.
After the object is fired in a kiln, it is polished until metal walls or inlays become visible again.
The enamels give a gem-like surface of various colors on the surface.