Gorgeous and delicate discribes this beautiful pin circa 1945.  A beautifully cut onxy measuring 5/8" tall by 1 1/8" wide sets inside a delicate framework of sterling silver openwork which is hand set with marcasites.  This pin has a beautiful dark patina and is marked only "Sterling".  The overall measurements are 1 1/8" tall by 1 1/2" wide.