I do trust the seller. He has proven to be honest and very knowledgeable .

What I was thinking and maybe im way off the mark here.

This looks to me to be an old stone because of the way it was cut on the underside.
Yet the top stamps looked so fresh. Maybe the original stamps were worn away mostly and then the new owners of the mine re stamped the top at a latter date.

The thing that puzzles me about the stamp or ink on the front is that how could that be a Maruka stamp when the Maruka sign is like 4 symbols long and my ink is on a part of the stone only capable of holding one symbol, size wise?

At the end of the day, if we didn't question things then we wouldn't be human and we would never have gone to the moon , allegedly