Armed with consumer wish lists that include big-name fashion brands, colored gemstones, estate jewelry, and fill-ins like silver and pearls, retailers heading to JCK Las Vegas in June say they’re expecting a vibrant show. This year’s presidential race creeps into most conversations, to be sure, but most people who spoke to JCK don’t anticipate drastic changes in the market no matter who gets voted into office.  Last year’s strong jewelry industry performance is still fresh in many retailers’ minds: Sales of fine jewelry and watches in the United States were an estimated $20 billion in November and December, a 2.4 percent gain over the same period in 2014, according to the Department of Commerce. That marked a turnaround from 2014 and 2013, when sales dipped 1.9 percent and 1.2 percent, respectively. Full-year 2015 results saw U.S. fine jewelry sales reach $66.5 billion.