How can i realize a real ancient antique(inscription tablet) from duplicate one

Question:

How can i realize a real ancient antique(inscription tablet) from duplicate ones?

Best Answer - Chosen by Asker: consult an expert on that subject if you have lots of money get it carbon dated otherwise realizing the real from the repro is a life long process of learning about that special something that you have enough interest in to stay with it for that long even then experts a get fooled from time to time