MARCUS & CO. - AN ART NOUVEAU PHANTOM FIRE OPAL BROOCH. A rare and highly unusual biomorphic Phantom bright orange fire opal specimen supported by green enamelled gold tendrils suspends an enamelled gold bellflower and heart shaped boulder opal from a bezel set old European-cut diamond. Marked M + Co., faint scratched numbers. 2 1/2" x 1. #Marcus #ArtNouveau #brooch
An Antique Diamond and Enamel Brooch Set with a central pear-shaped diamond within an old-cut diamond, blue enamel and textured gold surround to the blue enamel ribbon surmount and old-cut diamond foliate trim suspending an articulated pear-shaped diamon
Art Nouveau Plique-a-Jour Enamel, Peridot, and Diamond Brooch - Marcus & Co. Centering a circular-cut peridot within a shaped plique-a-jour enamel frame with old European-cut diamonds and suspending a drop - lg.
An Art Nouveau plique-à-jour enamel and diamond leaf brooch, Marcus & Co., circa The double-leaf motif of shaded green plique-à-jour enamel accented with small old-mine and single-cut diamonds, mounted in 18 karat gold and platinum, signed Marcus & Co.