A vitreous substance whose main component is silica mixed with oxides (transition metals) that create a vast palette of colours. Enamel is used to decorate metal surfaces, in particular gold, silver and copper.

• Translucent enamel allows the passage of more or less light, for example the opalescent enamels that give a sought-after milky quality to certain pieces.
• Champlevé enamel
• Cloisonné enamel
• Painting on enamel