The edges do look sharp so I suspect you guys are right. However when I look under the loupe .. I can see sandstone and faint traces of material and weathering which is throwing me. They certainly could be pressed and artificially weathered .. either way .. pretty cool .. I will get them looked at but I suspect copy. Another problem I see is the guy took the time to mount them, he has pencil marks on the bottom where he cataloged them for some reason ... So maybe special ordered copies ... dunno