ˈAmazon-stoneMin.[named from river Amazon.]A mineral; a ‘bright verdigris-green and cleavable’ variety of orthoclase, worn as an amulet by the Indians of the Rio Negro.1836Macgillivraytr.Humboldt'sTrav.xviii. 266Those green pebbles known by the name of Amazon-stones and worn as amulets.1862RawlinsonAnc.Mon. I. vi. 474They are cut upon serpentine, amazon-stone, and Lapis-lazuli.