thank you for writing in. Your cameo with male head - (usually profile) yes, could be a roman emperor, male roman emperor usually has short curly hair, the addition of a beard, (and possibly even a mustache) would depict a roman emperor of around the 3rd century AD. The short hair and beard were characteristic of this period. It could be a genuine antique cameo or a modern reproduction. Interesting to know what the material is made from? This will help in dating the cameo and also affect the value.