In the rigorous system of English armory, Argent is one of the two primary metals, alongside Or (gold). It is most frequently rendered as a stark white to ensure high contrast against the darker colors, or 'tinctures,' in accordance with the Rule of Tincture. This rule dictates that metal may not be placed upon metal, nor color upon color, a practical necessity born of the need for immediate recognition on the medieval battlefield. In fine emblazonments, particularly those commissioned for the high nobility, real leaf silver was occasionally employed, though its tendency to oxidize and turn black often necessitated the use of white pigment or 'platinum' substitutes.
Beyond its visual function, Argent carries symbolic weight within the medieval chivalric mind. It was often associated with purity, innocence, and the moon in the diverse lapidaries and allegorical texts of the period. In the formal blazoning (the verbal description) of a coat of arms, the word 'Argent' is always capitalized by modern heralds and is never substituted with the word 'white,' maintaining the linguistic integrity of the Anglo-Norman heraldic tradition that has persisted since the 13th century.