Vintage Turqoise Round Screwback Earrings 1960's 1970's

Thank you for viewing this listing! This is a pair of vintage round, ball-shaped turqoise screwback earrings. The material is most likely plastic and the vintage is late 1960's or early 1970's. They measure about 1/2 inch in diameter. The backings have a hinge portion that opens in addition to the screw feature to make it easire to put them on and remove them, as shown in the photo.