सुवर्णं पूर्वं निकष्य पश्चाद्वर्णिकां निकषयेत् ॥ कZ_०२.१३.१७ ॥
suvarṇaṃ pūrvaṃ nikaṣya paścād varṇikāṃ nikaṣayet
افرك الذهب أولًا على حجر المحكّ؛ ثم افرك عليه معيار اللون المرجعي (varṇikā) (للمقارنة).
It fixes the unknown sample’s streak first, then immediately compares it to a known standard under the same surface conditions—reducing dispute and manipulation.