Copper is symbolic of connection. To North American tribes, it denotes status. In alchemy, it is the sphere of Venus linking it to warmth and femininity. A bright yellow, metallic element. It was highly esteemed by the Hebrews and plentiful during the reigns of David and Solomon.
Gold is the most precious of metals and symbols of all that has the highest value.
In most cultures, it is linked to the sun. Iron was valued more highly than silver and gold. Iron denotes durability and flexibility. In Mexican and Minoan cultures, it represented male strength. There are more than a hundred lead compounds.