and Diamond Brooch. Signed Art Nouveau 18kt yellow gold brooch or pendant displaying a central pear-shaped amethyst with (4) bezel set round faceted diamonds and terminating in a polished amethyst drop. Pear-shaped amethyst measures approx. 9.0mm x 13.5mm. Stamped, "18K" alongside an unidentified pictorial hallmark; additional stamp of, "XACO". Total approx. weight is 4.5 dwt (gross). From a Hollis, NY estate. Dimensions: brooch measures approx. 1" w x 1.5" in overall length.品相报告: Good, with light surface scratches and minor dings/dents.