Enamel is a fusion of powdered glass to a substrate by firing, usually between 750 and 850 °C. Enamelling is an old and widely adopted technology mainly used in jewellery and decorative art. Faberge is the most recognised jewellery for using this technique.
Colour in enamel is obtained by the addition of various minerals, often metal oxides cobalt, praseodymium, iron, or neodymium. The latter creates delicate shades ranging from pure violet through wine-red and warm grey. Enamel can be transparent, opaque or opalescent (translucent).