कालिङ्गकस्तापीपाषाणो वा मुद्गवर्णो निकषः श्रेष्ठः ॥ कZ_०२.१३.२१ ॥
kāliṅgakas tāpīpāṣāṇo vā mudgavarṇo nikaṣaḥ śreṣṭhaḥ
La mejor piedra de toque es una piedra del tipo Kāliṅga o una piedra Tāpi, de color de frijol mungo.
To standardize equipment across officials and marketplaces so results are comparable and legally defensible.