सुवर्णसूत्रान्तरं सोपानकम् ॥ कZ_०२.११.२५ ॥
suvarṇasūtrāntaraṃ sopānakam
A “sopānaka” is an ornament having intervals/sections of gold thread (suvarṇa-sūtra) arranged in a stepped/graded manner.
Pattern definitions make acceptance testing objective and reduce valuation disputes; they also deter under-delivery of gold content.
Clear type-definitions allow authorities to prove misdeclaration (e.g., claiming sopānaka while supplying a simpler form), enabling fines or confiscation under trade rules.