Vintage Stone Mayan Statue

A polished stone (I believe obsidian) statue in the style of the Mayans or Aztecs. The figures has a headdress and looks to be sitting with its hands on its knees. The statue looks black in some lighting and grey/brown in other. The figure is 6 1/2" tall, 3 1/4' in width and about 2 1/4" deep.