Anandakanda 1.4.301

1.4.301

tārabījamidaṃ khyātaṃ pārade tacca jārayet /
<tṛtīyaṃ tārabījam>
tīkṣṇaṃ vaṅgaṃ ca vimalāṃ samāṃśaṃ cūrṇayetpriye //

This is celebrated as silver-seed; one should digest it into mercury.
<Third silver-seed>
Iron, tin, and iron pyrites in equal parts one should grind, my beloved,