|"What manner of faerie are you?"
The title of this article is conjectural. Although it is based on canonical information, the actual name is unknown and may be changed when new information is released.
Rhysand's mother's ring is the ring that Rhysand made Feyre Archeron retrieve from the Weaver's Cottage to demonstrate that being Made allowed her to locate the Book of Breathings. The ring was given to the Weaver by Rhysand's mother so she could guard it until Rhysand's future bride or mate would have to come to retrieve it, demonstrating she was a strong enough wife for her son. Rhys sent Feyre to retrieve it because he wanted to give it to her, his mate.
When Rhysand, the High Lord of the Night Court, was receiving his training at an Illyrian camp, his mother gave him one of her rings so that he would know that he would always have her support. Once he was old enough she asked him to return it to her and since his sister was not yet born Rhysand's mother gave her ring to the Weaver so she could keep it until her son's future bride or mate would come to retrieve it if she was worthy of him she could go to the Weaver's house and get it back.
When Rhysand tried to demonstrate that Feyre should be the one to track down the half of the Book of Breathings belonging to Tarquin, the High Lord of the Summer Court, he tasked her with finding something of his that he had long lost in the Weaver's cottage, but did not tell her what it was.
Once she was inside the house she felt Rhys' power in a ring and when she took it the Weaver noticed her presence and tried to attack her, but Feyre against the odds succeeds in escaping from the Weaver with it. Later, after Rhys and Feyre were already mated, he told her the story of the ring and offered it to her as a symbol of their bond, but Feyre refused to take it and told him that she would do it after the War was over. Although she starts to wear it only when she will came back from the Spring Court in A Court of Wings and Ruin.
It is described as a ring of twisted strands of gold and silver, flecked with pearl, and set with a stone of deepest solid blue; sapphire but different. The pale lines of a six-pointed star radiate across the round, opaque surface of the bluestone.