Rasendrapurana 46.117

Rasendrapurāṇa 46.117

kṣatriyaratnamāraṇavidhiḥ
nīlaṃ ca śaṅkhacūrṇaṃ ca śilābhūnāgasūraṇam
dhriyate kṣatrajātīnāṃ puṭaiḥ svābhirna saṃśayaḥ