Huh. Commenter was right, the ring was rose gold when Marinette wore it. Same shape, as far as I can tell, but definitely rose gold. And the earrings when Adrien handed them back to Tikki did not look nearly that similar to earrings as Marinette ordinarily wears them—flat silver-tone discs with a subtle pattern I can't quite make out, instead of black-or-dark-red cabochons.