Star of Elendil
Star of Elendil or Elendilmir was the name given to two noble star-shaped white gems. Both of these gems were set on mithril fillets. Because of its association with Elendil and the royalty of Arnor, it was also referred to as Star of the North Kingdom and Star of the North.
The first Elendilmir
The first jewel dated back to the early centuries of Númenor, and belonged to Silmariën, the daughter of King Tar-Elendil. From her, it passed to her descendants the Lords of Andúnië. Much later, following the same custom of Númenor, the Sceptre was the main symbol of royalty in Arnor, not the crown, so they bore the Eledilmir, bound on their brows with a silver strand.
Isildur had only been King for two years when he was waylaid by Orcs and lost in the Great River in the Disaster of the Gladden Fields. When he put on the One Ring to escape from the battle he became invisible but the Elendilmir did not, blazing instead like a red and wrathful star. Much later the Elendilmir was found by Saruman's trackers who had been sent to find the One Ring. They did not discover the Ring but they brought to him the Star of Elendil and other things.
The second Elendilmir
The original Elendilmir was lost with Isildur, and so a copy was made by the elven smiths of Rivendell for his son Valandil. This second Star of Elendil became the royal symbol of the North-kingdom along with the Sceptre of Annúminas. After that kingdom's fall it remained an heirloom of the Heirs of Isildur and kept in Rivendell. It remained in Isildur's line down to the time of Aragorn, who wore it upon his brow during the Battle of the Pelennor Fields. After the Siege of Minas Tirith, Aragorn gave the Star to the keeping of the sons of Elrond before his healing work at the Houses of Healing. He used it again during his coronation, bound with a silver strand.
After the War of the Ring, King Elessar ordered the restoration of Orthanc and then the original Elendilmir was found. As Elessar took up the kingship of Arnor he wore the original Elendilmir upon his brow. He would only wear it again on high days, whilst on other occasions he would wear the second Elendilmir that had descended to him.
- J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The Disaster of the Gladden Fields"
- J.R.R. Tolkien, The Lord of the Rings, Appendix A, "The Númenorean Kings", "Eriador, Arnor, and the Heirs of Isildur", p. 1043
- J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Battle of the Pelennor Fields", p. 848
- J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Houses of Healing", p. 861
- J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Steward and the King", pp. 966-967
- J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The Battles of the Fords of Isen", Appendix (ii)