A hei tiki – literally, a human-shaped pendant – is a piece of jewellery worn by men and women of high rank on special occasions. There is no consensus as to the being depicted. The Maori attribute the power of fertility to such a pendant: women wear it to ensure childbirth goes smoothly, among other reasons. Its power increases through accumulating the spiritual force (mana) of its owners as it is passed on from generation to generation.