सकेसरः स्निग्धो मृदुर्भाजिष्णुश्च निकषरागः श्रेष्ठः ॥ कZ_०२.१३.२० ॥
sakesaraḥ snigdho mṛdur bhājiṣṇuś ca nikaṣarāgaḥ śreṣṭhaḥ
最良の試金石の色筋は、花粉のように(豊かに)濃く、つやがあり、柔らかく、光沢を帯びるものである。
They translate metallurgical quality into field-usable criteria for inspectors, enabling standardized grading without advanced instruments.