Gold, platinum, emerald, pearl and diamond brooch, Marcus & Co. Photo Sotheby's Designed as a heart composed of scrollwork motifs, centering a round emerald weighing 2.82 carats, accented by two old European-cut diamonds weighing approximately 2.00 carats,...

A topaz and diamond brooch/pendant, by Marcus & Co. The oval mixed-cut pink topaz within a single-cut diamond border, to a further similarly cut diamond floral and foliate surround, suspended from a later detachable brushed tied ribbon bow, diamonds approx....