The well of wisdom located beneath one of the roots of Yggdrasil, guarded by the god Mimir. Odin sacrificed an eye to drink from it, gaining immense knowledge and foresight—a direct parallel to beryl's association with clarity, truth, and the cost/pursuit of wisdom.

Objects kept in the breastplate of the High Priest of Israel, used for divination and discerning truth and God's will. Often speculated to be stones or gems, they represent the archetype of clear, divine communication and judgment.