daniel, The piece looks like a oval shallow bowl; couldn't you make a damp sand mold. Billie

Daniel, this is a metate. It's not molded; ancient Indians started out with a flat rock and used another, more hand-sized rock for a grinder. They'd put grain on the flat rock and grind them by rubbing the hand-sized rock (called a "mano," meaning "hand") back and forth over it. Over time, the metate wears down so there's a depression in the middle where the mano was used.

I knew my childhood in the Southwest would come in handy someday. :)

my question was if anyone could show me how to make a mold to reproduce it.
daniel

Thank you for the information, Granny Anna. I knew it was a stone, too. I have three of them found on my farmland. Over the years we have found many arrowheads and ax heads and metates. One of my late husbands favorite hobbies was walking the just plowed fields searching for new upturned treasures.

Daniel: Yes, I do know how to reproduce them. Get two stones and rub them together. You will either get a metate or start a fire. :)BB

Daniel, I would think that you could cast a block into the approximate size and shape, then carve it to get the desired curves. It's great that you have an original piece to copy from. Looks like a great project! Let us know how you get on.

~GC