Rasendrapurana 46.195

Rasendrapurāṇa 46.195

tyājyavaidūryavarṇanam
vicchāyaṃ mṛcchilāgarbha laghu rūkṣaṃ ca sakṣatam
satrāsaṃ paruṣaṃ kṛṣṇaṃ vaidūrya dūratastyajet