कालायसस्यार्धभागाभ्यक्तं कृष्णं भवति ॥ कZ_०२.१३.५५ ॥
kālāyasasyārdhabhāgābhyaktaṃ kṛṣṇaṃ bhavati
ເມື່ອທາ/ປິ່ນປົວດ້ວຍເຫຼັກດຳ (kālāyasa) ເຄິ່ງສ່ວນ ມັນຈະກາຍເປັນສີດຳ।
Surface treatments can disguise base metals; state knowledge of such methods supports enforcement against fraud in bullion, ornaments, and coin-like pieces.