कालिङ्गकस्तापीपाषाणो वा मुद्गवर्णो निकषः श्रेष्ठः ॥ कZ_०२.१३.२१ ॥
kāliṅgakas tāpīpāṣāṇo vā mudgavarṇo nikaṣaḥ śreṣṭhaḥ
La meilleure pierre de touche est une pierre de type Kāliṅga ou une pierre de Tāpi, de couleur haricot mungo.
To standardize equipment across officials and marketplaces so results are comparable and legally defensible.