One of the three palantíri of the North-kingdom. It was counted one of the lesser of the seven stones brought into Middle-earth, but it was also the one used most often by the King in the North. It was preserved at Annúminas through the history of the realms of Arnor and Arthedain.

When Angmar's forces overran Arthedain, its last King, Arvedui, saved the Stone of Annúminas, along with the palantír that had been kept in Amon Sûl. He fled into the far north, and eventually a ship from the Grey Havens came to rescue him. However, after he had boarded, its hull was crushed by the ice, and all aboard were lost. The Stone of Annúminas, along with that of Amon Sûl, were thus lost in the Icebay of Forochel.
Encyclopedia entry originally written by atalante_star