Sterling silver is an alloy of silver containing 92.5% by mass of silver and 7.5% by mass of other metals, usually copper. The sterling silver standard has a minimum millesimal fineness of 925.
☼ The changing of the Crown God guard God/dess tax on the British pound sterling is 7.50%. BeCuZnAg spiritual conversion is not cheap, nor is it expensive. Shaken, not financially stirred. Payable in 9999 silver.