Vintage reworked stone and bone earrings

These are a pair of dark silvertone earrings of hoop shaped unknown metal with a lovely patina and french style hoops. On these I have attached a silvertone skull and crossbones paved with clear rhinestones (one is missing) and stuck pieces of citrine and peridot within his eyes. Above him is a genuine turquoise cabochon and below is a long bar of natural colored bone. The other earring is diff but matching with turquoise, darker bone, citrine, peridot and unknown veined yellowish stone.