Many of the earrings found in Ancient Rome are based on Hellenistic styles. The hoop and drop earrings being quite popular in the archeological record. Below are some of the different types. (The abbreviated version)
One of the many special things about the SCA is that we get to be nostalgic. Which is not something you always get to do with re-enactment. And what I mean by nostalgic is that we can display those symbols associated with awards that have been bestowed upon us in a not so always historical manner.