Marcus & Co. - An Art Nouveau 18kt Gold, Aquamarine, and Plique-à-Jour Enamel Ring. Centring a long, bezel-set, rectangular-cut aquamarine in a plique-à-jour enamel mount with aquamarines and old European-cut diamonds, signed.
AN ART NOUVEAU ENAMEL, DIAMOND AND DEMANTOID GARNET BRACELET, BY BOUCHERON. Composed of a series of yellow and green enamel wheat sheaf links, enhanced by old European-cut diamond borders, joined by similarly-set spacers of foliate design, accented by demantoid garnet collets, mounted in platinum and 18k gold, circa 1910, with French assay marks and maker's mark, in a Boucheron blue leather case. Signed Boucheron Paris | JV