Anandakanda 1.23.236

1.23.236

<aṣṭamaḥ prakāraḥ>
kāsīsaṃ saindhavaṃ sūtaṃ tulyaṃ tulyaṃ vimardayet /
kāsīsasyāpyabhāve tu dātavyā phullatūrikā //

<Eighth method>
One should grind green vitriol, rock salt, and quicksilver in equal parts;
in the absence of green vitriol, however, phullatūrikā should be used.