These One Inch Flowers in Sterling Earrings are Screw Earrings but can be easily changed by your jeweler or a kit from Hobby Lobby. The are both marked sterling on the end of the screw. The dark sterling has a lovely patina. They are not mark mexico but I bought them with a big lot of Mexican silver. For you from Kansas!!
VINTAGE Mexican Sterling 1 Inch Flowers Screw Earrings