COMINGS AND GOINGSEd Hrabak>>?Sterling Jewelers senior vice president of merchandising Ed Hrabak will succeed Bill Montalto as executive vice president and chief operating officer. The change will take place at the end of June, upon Montalto’s retirement after 26 years of service.>>?Michael Margolis has been appointed president of Sowind Group’s America division. Margolis comes from Hublot, where he worked as U.S. sales director.>>?Ray Bleser, founder of the Schenectady, N.Y.–based Northeastern Fine Jewelry, has been appointed chair of the board of directors of the Chamber of Schenectady County.>>?Steven Mazza of the Mazza Co. has been elected president of Prestige Promenade. Former president Douglas Sills, who stepped down Feb. 1, will continue to serve as director.>>?Hearts On Fire hired Ilaria Lanzoni as its director of design. Lanzoni joins the com