If you uncritically accept earrings as a bribe because they're shiny, that's a skill issue, as expected of beaurobstacles. Jewelers experiment with funny alloys all the time. At best, you get a set of cool-looking earrings that are 14 karat gold, with some mors and vitae to prevent them from being rendered back into boullion. At worst, well, Salt of Selene is used to make the ritzier kinds of costume jewelry.