COMINGS AND GOINGSHal Rubenstein>>?New York City–based jewelry company Gabriel & Co. has named Hal Rubenstein its global style ­director. Rubenstein—who just wrapped a 20-year stint at InStyle, where he was a founding editor, fashion director, and, most recently, editor at large—will help craft Gabriel & Co.’s brand strategy and redefine its look, feel, and messaging.>>?The Edge Retail Academy added Larry Johnson and Grant Walsh to its mentoring team. Johnson, author of The Complete Guide to Effective ­Jewelry Display, will provide case-by-case analyses of displays. Walsh, founder of Walsh Family Business Advisory Services, will advise on family succession.>>?Veteran brand and marketing exec Kevin Hall has been named president and CEO of Geneva Watch Group. He has worked with Procter & Gamble and Fidelity Investments.>>?Rolex has appointed Je