 In some images, she wears a skirt made of human bones and a star border, a symbol of her primordial sacrifice.Many sculptures of Tlaltecuhtli were meant only for the gods and were not intended to be seen by humans.She was often carved onto the bottom of sculptures where they made contact with the earth, or on the undersides of stone boxes called "cuauhxicalli" ("eagle box"), which held the sacrificial hearts she was so partial to.