These are two of the original Peralta Stones found in 1947 and said to form a secret map showing the location of the Lost Dutchman gold mine. They are currently on display at the Arizona Museum of Natural History. The are mounted behind glass so I could only image one side.
Each stone measures 14"w x 8.5"t x 2"d
If I get enough interest I may go back and ask to photograph all sides.
Let me know.