A high-end show where retailers (not suppliers) ruleFifty-five vendors may sound like a ­paltry sum in the trade-show world, but when the exhibitors are high-end gallerists with hundreds of individual SKUs, the event becomes a lot more interesting—and valuable. ­Jewelers in search of art jewelry would do well to scope out what their peers in the gallery world are stocking.The 14th Annual Sculpture Objects & Functional Art Fair (SOFA), April 14–17 at the Park Avenue Armory in New York City, draws galleries and dealers in a variety of media for an open-to-the-public show (sofaexpo.com) that has earned rave reviews from attendees. The retail event kicks off with an invitation-only preview April 13 and includes a three-day lecture series, a designer breakfast and panel discussion about contemporary design, and a New Collectors/Young Designers Night.In the jewelry arena, visitors se