Anandakanda 2.5.44

2.5.44

mriyate nātra sandehaḥ kāntaṃ tīkṣṇaṃ ca muṇḍakam /
<lohabhasmavidhiḥ (5)>
śuddhasūtaṃ dvidhā gandhaṃ khalve kṛtvā tu kajjalīm //

Loadstone, cast iron, and wrought iron are killed, of this there is no doubt. / <Method 5 for iron calx> / Having made black sulphide of mercury (kajjalī) in a mortar from pure quicksilver and two parts of sulphur,