Blue plique-à-jour enamel ring in 18K white gold. Signed SA-P for Solange Azagury-Partridge, with English hallmarks. The retail price is £5800 (approximately $7500). Plique-à-jour is a difficult enameling process in which enamel is applied to an area with no backing instead of onto metal. The result is the enamel is transparent or translucent. Modern White Gold Rings With Enamel, Modern Enamel Rings For Formal Occasions, Luxury Enamel Ring With Polished Finish, Blue Enamel Fine Jewelry Ring, Blue Enamel Ring Fine Jewelry, Blue Enamel Ring In Fine Jewelry Style, White Gold Enamel Rings With Polished Finish, Blue Polished Enamel Ring, Blue Enamel Polished Round Ring