Elfstone, also known as the Elessar or the Stone of Eärendil, is a famous green jewel that Galadriel gives as a gift to Aragorn just before the Fellowship of the Ring leaves the wood of Lothlórien. This stone, worn by Aragorn, later causes him to also be given the name of Elessar by the people of Minas Tirith.
There are a variety of stories about the jewel's origin in the Unfinished Tales:
- "There was in Gondolin a jewel-smith named Enerdhil, and he was the greatest of that craft among the Noldor after the death of Fëanor... it came into his heart to make a jewel which the clear light of the sun should be imprisoned, but the jewel should be green as leaves. And he made this thing, and even the Noldor marvelled at it. For it is said that those who looked through this stone saw things that were withered or burned healed again or as they were in the grace of their youth, and that the hands of one who held it brought to all that they touched healing from hurt."
- ― Unfinished Tales, "The Elessar"
Here the story diverges into two versions:
- Gandalf brings back the jewel from Valinor and gives it to Galadriel, as a token from Yavanna that the Valar have not forsaken Middle-earth. In this version Gandalf also remarks prophetically to Galadriel that she will only hold it for a little while, before she passes it to another, who will also be called Elessar.
- Galadriel is pained at the state of Middle-earth and wants something to help heal its wounds. Celebrimbor, who is in love with Galadriel, remakes the jewel as her behest. It is interesting to note that Celebrimbor was also in Gondolin in the time of Enerdhil and learned much from him. Although we are more familiar with Celebrimbor (and his Rings of Power), he was actually overshadowed by the superior skill of Enerdhil, who was second only to Fëanor.
There is also a third version that differs greatly from the first two. In that there is no mention of Enerdhil and instead it was Celebrimbor himself who in Gondolin made the original jewel. Eärendil takes this jewel to Valinor forever and in the Second Age Galadriel asks Celebrimbor to remake the jewel again.
All versions end with the jewel in Galadriel's possession. She then gives it to her daughter Celebrían, who in turn gives it to Arwen. It nonetheless is in Galadriel's keeping in Lothlórien before she passes it on to Aragorn. According to J.R.R. Tolkien, this also held the function of a wedding gift from the family of the bride to the groom.
Another point of note, is that Aragorn urged Bilbo Baggins to include a green jewel in his poem about Eärendil, possibly anticipating the symbolic importance that the gem would have in his life. Bilbo Baggins, obeying Aragorn but seemingly unaware of the Elfstone's story, included an inaccurate reference to an emerald.