नागपर्वतकं रूक्षं शैवलवर्णं वा ॥ कZ_०२.११.५४ ॥
nāgaparvatakaṃ rūkṣaṃ śaivalavarṇaṃ vā
‘Nāgaparvataka’ khô/nhám, hoặc có màu xanh như rong biển.
Dryness/roughness can indicate age, storage conditions, or a different grade; recording it supports rotation decisions and valuation adjustments.