looks to be native american made from other rings I OWN. and the craftmanship from the pics if that help if it is heavy then it is def hand made..and most time older made native american hand made rings have no mark but the makers mark from what I know of unless it is a well know jewler. From the color of the stone it is a north wetsern vein of turquise not NEW MEXICO but def mid west if that helps you.