The small Christmas plaquettes from Aluminia are manufactured in faience. Most of the Christmas plaquettes are blue, but some of them also have other colors.
Royal Copenhagen and Bing & Grondahl Christmas plaquettes are made of porcelain with blue underglaze decoration, as we know from the traditional Christmas plates. It can be difficult to tell the difference between the plaquettes if you do not know the factory stamps, but the Royal Christmas plaquettes are known on the characteristic edge with white base color and a blue-patterned rim. On Bing & Grondahl Christmas plaquettes the motif fill the whole plaquette and the motif often depicts people.