Iron is one of the most abundant elements in the universe, and Mars is its dominant planet. Asian, African, and European civilizations all made extensive use of the metal. Iron represents male energy and is associated with physical strength, aggression, growth, reliance, and protection. Lust, confidence, courage, strength, stamina, and resilience are some of the emotions it encourages. It is the most ‘human’ metal, and as a result, the ethereal creatures and spirits are wary of it.