This is a 7 1/4'' Mayan calender on a 15'' hexagonal wood plaque. A 1 1/4'' stone border in high relief is at the edge. The calender and edge are done in the same material. I'm not sure if it's natural or man-made. It might be a composition material. The back has a label fro, ''Industias Y Artesanias De Mexico.'' This heavy, 5 pound, wall hanging was no doubt a souvenir. there are a few scrapes on the wood an the back. It has a heavy wire for hanging.