COMINGS AND GOINGS>>?Chamilia has appointed executive vice president and chief business development officer Michael ­Flaherty as its new CEO.>>?Prestige Promenade named Chris Casey its new executive director. Casey spent eight years with Nielsen Co., running its jewelry properties including Couture, the JA New York shows, and National Jeweler.>>?Patrick W. Welch, most recently the chief operating officer of Adaco Services, has been named ­president and COO of Rembrandt Charms. >>?Belle Étoile president Jim Grohn has retired. Grohn was appointed in November 2010; a replacement has not been announced. Debra King was hired as Southeast sales director. She recently worked as a regional sales manager for Montblanc.Coleman Clark>>?Jewelers of America has named new board members: Coleman Clark, president of B.C. Clark ­Jewelers in Oklahoma City; Lane Schif