Anandakanda 2.5.6

2.5.6

<iron:: subtypes>
kāntāyastīkṣṇamuṇḍākhyaṃ lohamevamapi tridhā /
rasāyanebhyaḥ sarvebhyo vidyācchataguṇādhikam //

<Iron: subtypes> / Iron is thus three-fold: known as magnetic iron, wrought iron, and cast iron. / One should know it to be a hundred times superior to all rejuvenating agents.