Finally, after reading Louis Slobodkin's nice book on sculpture with all the handy tips about plaster casting, I have a resin and marble dust copy. This is still not the end product, but will be used to get reference points for drilling into real stone. One cool tip picked up from that book is when you are making the plaster mold over a clay original, pick an odd color like blue pigment powder mixed in with the first thin layer of plaster. Then proceed with white for the rest of it. So, when you are chipping off the mold from your casting, you see the blue when you get close to the cast part. Otherwise, this face might be missing a nose or something... Maybe that would have made it more real looking (ancient)?