कालिङ्गकस्तापीपाषाणो वा मुद्गवर्णो निकषः श्रेष्ठः ॥ कZ_०२.१३.२१ ॥
kāliṅgakas tāpīpāṣāṇo vā mudgavarṇo nikaṣaḥ śreṣṭhaḥ
Ang pinakamainam na batong pansubok ay batong uri ng Kāliṅga o batong Tāpi—kulay munggo.
To standardize equipment across officials and marketplaces so results are comparable and legally defensible.