Actually you may be speaking of ‘Plique a Jour’-an enamelling
process in which the goundplate is removed after firing;the end
result resembles stained glass, the translucent enamel framed in
'Heinrich Levinger, while not as well-known as Fahrner, but was
another Pforzheim manufacturer which were noted for stylized organic
forms in plique a jour enamel and silver. They made designs
attributed to Viennese designer Otto Prutscher (1880-1949).
Enameling is one of the most important decorative elements in Art
Nouveau jewelry. One of the techniques that Lalique was noted for,
and which became closely associated with Art Nouveau jewelry. It is
particularly effective when used to depict insect wings and
landscapes with sky and water. It is a difficult technique, and the
results are fragile. Intact pieces are scarce. Taken from Christie
Romero’s ‘Jewelry Identification and Price Guide’ 3rd Ed.
Warman’s Jewelry (3rd Edition)
By Christie Romero
Manufacturer : Krause Publications
Release data : December, 2002
Cheers ! Dinah.