Vintage Celluloid Floral Pin & Clip Earrings Turquoise Gem Center

Vintage pin and earrings. Earrings are screw back earrings. The earring don’t work. I can’t get the screw mechanism to twist. I would cut off the screw backs and glue post or clip earrings on these. I believe these are made of a vintage type of plastics call celluloid. But I’m not and expert. They are very light weight. Center bright blue gem is made of acrylic and is a shade of turquoise. There is some Corrosion / tarnish on the tips of the gold floral accents around one flower on the pin. Pin approx 3 1/8” inch long. Earrings approx 1” diameter This is kind of a creamy or ivory white. It’s not a bright white.