Augustus Caesar Plaque Recreation (resin cast). About 8 3/4 inches by 7 1/2 inches. This is a recreation of the Gemma Augustea. The Gemma Augustea is a low-relief cameo gem cut from a double-layered onyx stone. The gem cutter was probably Dioscurides or one of his disciples. This is a recreation of this amazing stone cut of Augustus Caesar.