GOING FOR GOLD: Who said all that glitters isn’t gold? Not London-based Belmacz jewelry designer Julia Muggenburg, who’s added flecks of the precious metal to a multipurpose beauty balm dubbed Halo. The ointment, which bowed in stores including Barneys New York and Colette on Monday, also comprises crushed pearls, rose-hip oil and cocoa butter. It’s priced at 38 pounds, or $68, at current exchange. “The gold gives pleasure,” said Muggenburg. “It has a nice way of blending into the formula once you apply it.” Belmacz’s nascent beauty lineup also includes gold-flecked lip glosses and Oyster Pearl Powder.