Copper (cuprum) is correlated with the Cyprian (Aphrodite, Venus). In the chamber they found a three-cornered tomb containing a copper cauldron, and in it was an angel holding a tree that dripped continually into the cauldron.
Jung establishes copper’s foundational symbolic identity by linking cuprum etymologically to Cyprus and thus to Venus-Aphrodite, situating the metal at the heart of the alchemical hierosgamos and the burial of the erotic principle.
, Alchemical Studies, 1967thesis