This is a replica of the ring of Barahir that was given by Elrond to Aragorn, son of Arathorn, when he was told of his true name and lineage, together with the shards of Narsil. In the year 2980 of the Third Age, in Lórien, Aragorn gave the ring to Arwen Undómiel, and thus they were betrothed.
This platinum plated copper ring features a green Austrian crystal. Comes complete with a collector's box.
Not sure of your ring size? Check this article.