And the elemental from lodestone

Elements and Their EffectsEach of the six elements has one element against which it is strong and another element against which it is weak. Raising the individual values for ice, water, wind, lightning, fire, or earth will increase the amount of damage dealt by attacks corresponding to those elements, as well as decrease the amount of damage sustained by attacks of opposing elements. In addition, these values will also influence the amount of crystals awarded after combat.