How jewelers are managing the tightest labor market in years. Plus: tips on finding and hiring (and keeping!) the best people for your business.   People who make and sell jewelry say business is booming, but they have one key complaint: They can’t find anyone to do the work. Manufacturers, designers, and retailers say they have been casting a wider net, raising pay, and reevaluating their benefits and working environment to attract and retain talent. Industry Mirrors Broader Labor-Market Woes Lauren Priori, owner of L. Priori Jewelry in Philadelphia, spent five months looking for a person to fill an assistant position, a process that normally would have taken about a month. “I opened a third location in Washington, D.C., a couple of months ago, so that was my big staffing challenge of