n. The art of decorating with jewels.n. In ceramics: Decoration by means of small drops or bosses of translucent glaze applied to the surface, as frequently in Sèvres porcelain.n. Decoration by means of rounded projections of the substance of the body, these projections being covered with a glaze or enamel different from the rest of the piece, as in Doulton ware and some old grès de Flandres.