Amulet of Jahna Nui

The Amulet of Jahna Nui was a small ruby that held much powerful, but unknown powers.

Creation
When the Toa Rilla became Turaga, they put all their power into the deceased Toa Jutin's ruby heartstone, and placed it in Jahna Nui. Later, the Matoran found it and thought it to be a powerful stone of some sort, and believed it was an amulet that would protect them.