प्रतिलेपिना रसेन द्विगुणाभ्यक्तं तपनीयं शुकपत्त्रवर्णं भवति ॥ कZ_०२.१३.५६ ॥
pratilepinā rasena dviguṇābhyaktaṃ tapanīyaṃ śukapattravarṇaṃ bhavati
When fine gold (tapanīya) is coated twice with a plating/overlaying solution, it takes on the color of a parrot’s leaf (a bright greenish-gold sheen), serving as a test/marker of proper quality.
It provides an observable standard for verifying refined gold, helping the state detect adulteration and protect revenue in bullion handling.