The Elendilmir was a white gem set in a silver diadem, which was worn on a fillet of mithril on the brow of Elendil when he came to Middle-earth in place of a crown, and then also by his son Isildur after him.

It was first worn by Silmariën, the daughter of King Tar-Elendil of Númenor, and it was then passed down through all of the Lords of Andúnië. It eventually came to Elendil and then after his death, to Isildur, his son.

Sadly, the original Elendilmir disappeared when Isildur was killed at the Gladden Fields. A new one was then made, and it became a symbol of the royalty of the Northern Dúnedain, and then of the Heirs of Isildur, and was passed down from generation to generation, eventually coming to Aragorn.

After the War of the Ring, though it was believed that the original Elendilmir had been lost for more than three thousand years, it was found in Isengard and was returned to Aragorn.

King Aragorn II Elessar only wore the original Elendilmir on special occasions, wearing instead the second at other times.

**It is said that when Isildur put the One Ring on his finger, he was invisible, except for the bright, burning light of the Elendilmir on his brow.**

Additional information provided by Sindaeririel.
Encyclopedia entry originally written by Tinuviel_1