श्यावो नीलश्चाप्राप्तकः ॥ कZ_०२.१३.२७ ॥
śyāvo nīlaś cāprāptakaḥ
若呈深褐色或带蓝色,则不可接受(不得收取)。
It means the treasury/mint should not accept such metal as standard bullion—preventing loss from impure or debased gold.