Cloisonne - is a metal decorating technique. It is usually done with precious metals like gold and silver. It is colored with enamel powder and fired to get the beautiful glossy effect on them. The sheen of the metal adds to the shine of the finished piece. This is also known as Minakari in India.
This is my humble effort to get that look on paper.
The necklace has a chain clasp on silk cord and pretty earrings to go with it.