This piece doesn't have a signature. Its either some kind of clay, or ceramic, or possibly stone. Its hard to tell exactly.
I don't work with the material. I know its an expensive piece so i'm just starting at $300 obo.
Theres a small chip on the bottom right of the piece.
Its 15"x15" and weighs something like 25-35 lbs
If your interested or would like to see it, reply or call/text
Location: Boulder