From diamonds to pearls (of wisdom), we’ve got everything you need for a happy, successful, and nonstressful holiday sales season If anyone knows how to get through the holidays, it’s your fellow retailers. So in the spirit of the season, we asked them to share their tales from the tinsel-dusted trenches. (One recurrent theme: keeping staffers’ spirits up—and their bellies full. “We always keep a party atmosphere in our stores, because that trickles down to the guests,” says David Rogoway, co-owner of LaRog Brothers in Portland, Ore.) And just in case you need some ordering inspiration, they also revealed what they’re betting on to be their best sellers (surprise, surprise…yellow gold!). We finish off our annual Holiday Survival Guide with a catalog-style showcase of jewels in five trending categories. Because there’s nothing like moonstones to infuse your store with s