Of Night and Light and The Half-light by oshun

Lúthien of the Third Age

But the Queen Arwen said: ‘A gift I will give you. For I am the daughter of Elrond. I shall not go with him now when he departs to the Havens; for mine is the choice of Lúthien, and as she so have I chosen, both the sweet and the bitter. --The Return of the King: The Lord of the Rings

(The gift referenced above is not the standard she gave to Aragorn; she is speaking here to Frodo. I cited this for the reference she makes to the choice of Lúthien.)

And all eyes followed his gaze, and behold! upon the foremost ship a great standard broke, and the wind displayed it as she turned towards the Harlond. There flowered a White Tree, and that was for Gondor; but Seven Stars were about it, and a high crown above it, the signs of Elendil that no lord had borne for years beyond count. And the stars flamed in the sunlight, for they were wrought of gems by Arwen daughter of Elrond; and the crown was bright in the morning, for it was wrought of mithril and gold. --The Return of the King: The Lord of the Rings