Sterling silver jewelry is classically beautiful, nickel-free, and lasts a lifetime. To polish sterling silver, wipe gently with something acidic (like lemon juice) and a soft cloth, then rinse. The mark ".925" found on sterling silver jewelry means it contains a minimum of 925 parts per thousand pure silver. The remaining composition is made up of copper for strength and durability. Silver is associated with the moon, self-reflection, and protection.