Vintage Signed Coro Screw Back Earrings

Preowned, Vintage, Signed Coro, screw back earrings in gold tone setting. Light blue stone wrapped in a leaf design. One prong missing on each earring (didn’t notice this until taking these pictures), but the stones seem securely in place due to the leaf design around the top. I do not know what the stone is, but it resembles Aquamarine. One leaf has a spot of discoloration a little darker shade than the rest of the gold tone. Please see all pictures and video to aid in description and for signs of age and wear. Beautiful. Love this blue stone! First and last picture taken in front of a window on a sunny day. So pretty!