कालिङ्गकस्तापीपाषाणो वा मुद्गवर्णो निकषः श्रेष्ठः ॥ कZ_०२.१३.२१ ॥
kāliṅgakas tāpīpāṣāṇo vā mudgavarṇo nikaṣaḥ śreṣṭhaḥ
最好的试金石是迦陵伽型石或塔毗石——其色如绿豆。
To standardize equipment across officials and marketplaces so results are comparable and legally defensible.