Sunny yellow and orange crystals uplift the spirit, and are said to stimulate the body's universal life force, or Qi. It awakens mental inspiration and willpower. Yellow and orange crystals are linked to the solar plexus and sacral chakras, representing warmth, passion, vitality, and a positive sense of self. In color therapy, yellow is used to treat nerve-related conditions, as well as skin and liver issues. Metaphysically, yellow and orange crystals often represent abundance and manifestation.