घने सुषिरे वा रूपे सुवर्णमृन्मालुकाहिङ्गुलुककल्पो वा तप्तोऽवतिष्ठते ॥ कZ_०२.१४.३४ ॥
ghane suṣire vā rūpe suvarṇamṛnmālukāhiṅgulukakalpo vā tapto 'vatiṣṭhate
In a dense (solid) form or in a hollow form, a preparation of “gold-clay,” or sand, or a hiṅgula-like mixture remains evident when heated.
Fraud can be concealed both by mixing impurities into solid castings and by inserting adulterants into cavities; inspectors must test both construction types.