Coro Vintage Estate Sea Shell Carved Resin & Silver Tone Costume Clip Earrings

Designer signed vintage estate costume clip on earrings. Features shells carved from either some kind of dense plastic (possibly Bakelite?) or resin in light blue with swirls of purple and encased in (two prongs on each side) and surrounded by silver tone metal, and detail. Strong metal clasps have firm hold. Minor flaws and wear. (see images, shows a small brown spot of old glue or some kind of discoloration on one side, can't be seen while wearing) See all images for details, condition and size comparison.