Amarantha's ring and necklace are the jewels that Amarantha always wears. They were Jurian's eye and finger bone that Amarantha kept after she tortured and killed him. She used spells to trap Jurian's soul in both items. After Amarantha's death, the Attor retrieved the ring and necklace and gave them to the King of Hybern so he could bring Jurian back to life using the Cauldron and the items.
It's a simple golden ring with a glass ball encased over it. Inside the ball is Jurian's brown eye that contains his soul. The eye sometimes swirls and moves inside its encasing.
The necklace consists of a simple golden chain from which hang one of Jurian's finger bones.
Amarantha often talked to Jurian thought her ring and toys with the finger bone.