These are vintage intaglio earrings. Intaglio is an ancient technique of carving depictions into stone, in this case carnelian. In the Ancient Roman Empire, owning an intaglio ring, whether commissioned or inherited, was a sign of one's wealth and power. Their main use being to act as seals with hot wax, intaglio rings were designed out of both practicality and beauty.

These are very unique intaglio earrings with a roman warrior carved in carnelian with small onyx stones beneath it. 

Clip ons

Gold plated

Carnelian and Onyx