Luckily, “even if your silver is totally black, it’s pretty easy to un-blacken it,” said Rony Vardi, Catbird’s founder. You can polish sterling silver and brass jewelry using specially ...

according to Rony Vardi, founder of the New York-based jewelry company Catbird. “But we have a few extra tips and tricks up our sleeves, depending on the metal,” she adds. Silver is one of ...