ऊषरकर्बुरः पक्वलोष्ठवर्णो वा त्रपुधातुः ॥ कZ_०२.१२.१४ ॥
ūṣarakarburaḥ pakvaloṣṭhavarṇo vā trapudhātuḥ
Bijih/logam timah (tin) bercorak belang seperti tanah asin/alkali (ūṣara-karbura), atau berwarna seperti gumpalan tanah yang matang (pakva-loṣṭha).
They translate technical mineral recognition into common visual references so non-specialist officials can apply them in the field.