This is a beautiful Vintage Navajo Sandstone Painting that was painted by a Auntie in Canyon De Chelly. 
It is painted on Sandstone from the canyon by Spider Rock. Home to my relatives. 
There is nothing in the back to hang it, it’s just a slab of sandstone. It is quite heavy. 
It measures 9” x 6 1/2” x 3/4” approx.