Unicorn Stud Earrings magical mythical beasts 0.5" silver metal pewter NOS

Unicorn Stud Earrings unicorn busts, twisted horns, goatee on the chin metal backs grey silver, I am not sure what sort of metal this is, but it seems durable brand new, never worn no markings approximate dimensions (see pics) height 0.5" width 0.25" questions? please ask!