Material Bonus

A material bonus is granted by a dweomermetal, either when it is applied to a weapon, an armor, or a shield. Material bonuses to the same element of your character do not stack with each other; instead, only the highest available bonus is used. You can have multiple material bonuses, as long as they each apply to different elements of your character. Only where the same bonus type is being applied to the same element must you pick the highest available.