1. The Three Keepers
As the Ring-verse states, “three Rings for the Elven-kings under the sky.” Those rings have names and we got the quickest glimpses of them being worn: Nenya, which is also known as the Ring of Adamant, and the Ring of Water. It was made of mithril featuring a stone of the mythical mineral adamant. It was given to–and only worn by–Galadriel.
We see Narya, the Ring of Fire, and the Red Ring. It’s set with a ruby, originally worn by Círdan, who eventually passed it on to Gandalf, before spending his life in the Grey Havens.
Finally, there’s Vilya, the Ring of Sapphire, the Blue Ring, and the Ring of Air. It’s considered the most powerful of the trio, made of gold with a sapphire stone. It was originally worn by High King Gil-galad, but given to Elrond.
While we met Galadriel and Gil-galad in Season 1, the casting reveal for Círdan has yet to be announced.