COMINGS AND GOINGSDavid Bennett>>?David Bennett has been appointed worldwide chairman of the Sotheby’s jewelry division. Bennett previously held the title of chairman of the ­jewelry division for Europe and the ­Middle East.>>?Zalemark Holding Co. Inc. has named Steven Zale, who formerly served as chairman emeritus, its CEO. Deborah Blohm has been appointed brand director for the company’s Crayola line.>>?Lagos has named president Chris Cullen its new CEO, as founder Steven Lagos focuses on his roles as chairman and creative director. Cullen has served as president of the Philadelphia-based jewelry brand for the last seven years.>>?Worthy.com, an online marketplace that specializes in pre-owned luxury goods, has named former ­Tiffany & Co. executive vice president and chief gemologist Peter C. Schneirla as its first president.>>?Laurent Dordet has