The Ring We Might Have Made for Cate.
It is a statement of record that for the Peter Jackson Lord of the Rings movie trilogy we made the One Ring in all its appearances and Vilya, ring of Elrond.
We did not make any of the other elven rings and Lord of the Rings jewellery in the movie.
For copyright reasons we are not allowed to use the name of the ring worn by the character played by Cate Blanchett. We have however created our own interpretation of the 'Ring of Water' based on descriptions of this ring given in the book.