“Never lose an opportunity of seeing anything beautiful,” wrote essayist Ralph Waldo Emerson. In retailing, it could also be said that opportunities to make something beautiful are equally worthwhile. After all, humans are visual creatures—around 20 percent of our brain cells are used solely for vision (how wild is that?). With the holidays around the corner, this is a terrific time to beautify, change up, or completely overhaul your fine-jewelry cases. We asked three visual merchandising experts to weigh in on easy, effective ways to upgrade your cases for the year’s busiest selling season. On Display  Do your in-case display pieces look old? Is the fabric sun-faded? And, most important, do your display elements perfectly showcase the styles you’ve invested in for the holidays? Emily Graffagnino, visual merchandising and senior product manager for Lafayette, La.–based