A ROMAN CHALCEDONY MAGIC GEM
Circa 3rd Century A.D.
One side engraved with a pantheistic deity with four wings, a bird tail, and a frontal bearded human face, wearing an Egyptian atef-crown and holding Egyptian was-scepters, standing on the snake Ouroboros coiled into a circle that frames the letters IAW, the other side with the lion-headed snake Chnoubis on a plinth, framed by a lengthy inscription; mounted as a pendant in a modern gold setting
13/16 in. (2.1 cm) long