the face of evil incarnate

I'm thinking these rings might be carnelian and may have have come from actual egyptian mummies, probably bought and sold in elite antiquities circles.

"The Egyptians believed that the gems unite divine powers. Carnelian was a precious grave gift, which should bring a deceased a carefree life in the afterlife. Carnelian, also known as the stone of renewal, was even found in the tomb of the ancient Egyptian King Tutankhamen."