A central rose-cut diamond arabesque bezel set with OEC diamond umbel and OMC diamond drop, joins scrolling foliate and knife edge platinum links, rose-cut diamond terminals, diamonds approx. 2.8 cts. TW, France, ca. 1900. Stamped with French control marks for 18k and platinum. 16 1/4", central element 2" x 2". In original Mous F. Ducot & J. Fontan leather embossed “G. R” box with yellow gold fittings to convert central arabesque to brooch or hair pin, platinum mount to convert arabesque and foliate links to tiara, with bone handled screwdriver.