The ancients recognized the importance of metal, particularly as offerings to the gods, and much of that symbolism is still relevant in dreams today as we find our magical roots and progress on our spiritual journey.
Psychological / Emotional Perspective:
Most metals have symbolic meanings. They can also be connected with various planets:Sun is represented by gold, the Moon by silver, Mercury by quicksilver, Venus by copper, Mars by iron, Jupiter by tin, Saturn by lead. In dreams these ancient symbolisms begin to surface as we learn more. For instance, Mars the warrior wielding an iron sword suggests that we need to fight our own corner and become more assertive.
Everyday Material Aspects:
Any metal appearing in dreams represents the restrictions of the real world. It can represent basic abilities and attributes, but also can be hardness of feeling or emotional rigidity. An article made of lead suggests a heavy responsibility.
Consult the entries for Alchemy, Gold, Iron, Lead and Planets for further information and clarification.