तापो बहिरन्तश्च समः किञ्जल्कवर्णः कुरण्डकपुष्पवर्णो वा श्रेष्ठः ॥ कZ_०२.१३.२६ ॥
tāpo bahirantaś ca samaḥ kiñjalkavarṇaḥ kuraṇḍakapuṣpavarṇo vā śreṣṭhaḥ
金は、加熱/試金の影響が外側と内側で均一であり、色が花粉の色(金黄)または kuraṇḍaka の花の色に似ているとき、最上である。
It creates an enforceable state standard for purity/quality so officials can accept, reject, price, and tax gold consistently and detect adulteration.
It targets fraud where only the surface is made to appear pure; the state requires internal purity verified through assay.