सकेसरः स्निग्धो मृदुर्भाजिष्णुश्च निकषरागः श्रेष्ठः ॥ कZ_०२.१३.२० ॥
sakesaraḥ snigdho mṛdur bhājiṣṇuś ca nikaṣarāgaḥ śreṣṭhaḥ
最好的试金石擦痕颜色,应当如花粉般丰厚,且光泽润亮、柔和并有亮度。
They translate metallurgical quality into field-usable criteria for inspectors, enabling standardized grading without advanced instruments.