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 display