Anandakanda 1.9.94

1.9.94

etasya sevayā kāntasvarṇavajrābhrakārhakaḥ /
<svarṇakāntavajrābhrakarasāyanam>
bhasmayet svarṇakāntābhravajrāṇi ca yathoktavat //

By using this, one becomes qualified for magnetic iron, gold, diamond, and mica. / [The Rejuvenative Recipe of Gold, Magnetic Iron, Diamond, and Mica] / One should reduce gold, magnetic iron, mica, and diamond to ash as described.