Narapatijayacarya 12.35

12.35

iti yāmale ḍhakkā
baṅgasīsakaśuklābhrahematārasamanvitaiḥ ||
vajrāyasādibhiryuktaḥ kriyate pārado rasaḥ ||

Thus the kettle-drum in the Yāmala.
With tin, lead, white mica, gold, and silver,
combined with adamantine iron and so on, the quicksilver rasa is prepared.